Closs 1-In-4-Out 4-Port Gigabit PoE Splitter

Closs 1-In-4-Out 4-Port Gigabit PoE Splitter — image 1
Closs 1-In-4-Out 4-Port Gigabit PoE Splitter — image 2
Closs 1-In-4-Out 4-Port Gigabit PoE Splitter — image 3
Closs 1-In-4-Out 4-Port Gigabit PoE Splitter — image 4
Closs 1-In-4-Out 4-Port Gigabit PoE Splitter — image 5
Closs 1-In-4-Out 4-Port Gigabit PoE Splitter — image 6
Closs 1-In-4-Out 4-Port Gigabit PoE Splitter — image 7
Closs 1-In-4-Out 4-Port Gigabit PoE Splitter — image 8
Closs 1-In-4-Out 4-Port Gigabit PoE Splitter — image 9
81%
19%
93%
Ease of Setup
88%
PoE Compatibility
84%
Power Delivery Accuracy
91%
Gigabit Throughput
78%
Build Quality
69%
Thermal Management
86%
Value for Money
82%
Port Count Utility
87%
Cable Range Performance
74%
LED Status Indicators
67%
DC Power Flexibility
89%
Form Factor & Portability
61%
Brand Reliability Perception
More

Overview

The Closs 1-In-4-Out 4-Port Gigabit PoE Splitter solves a surprisingly common problem: you have one PoE-enabled port available and need to power four devices from it. The unit is compact — barely the size of a deck of cards — with an aluminum shell that feels solid without adding unnecessary bulk. There is no software, no login screen, no configuration file. You plug it in and it works. For small business owners or surveillance installers who do not want to swap out an entire switch just to add a few cameras, this four-port PoE hub offers a practical, cost-conscious path forward with genuinely minimal friction.

Features & Benefits

Full IEEE 802.3at/af compliance is what makes this PoE splitter genuinely useful across mixed environments. The per-port auto-sensing stands out most — each port independently negotiates whether the connected device needs 15.4W or the full 30W PoE+ budget, so a standard IP camera will not accidentally pull power meant for a hungrier access point. Data throughput holds at true Gigabit across all ports, which matters when pushing HD camera feeds or high-density VoIP traffic. It also accepts DC input in the 5–58V range for connecting to non-PoE sources, though the adapter is sold separately. The per-port LED indicators are small but useful for diagnosing link issues at a glance.

Best For

This PoE splitter makes the most sense in scenarios where rewiring is not an option. Security installers will find it particularly handy when a single conduit run already carries one PoE Ethernet drop to a remote location — run four cameras off that one cable instead of pulling new lines. IT teams mounting WiFi 6 access points in warehouse ceilings face the same constraint, and the Closs splitter handles it without consuming rack space. It also fits small offices deploying VoIP phones across a floor with limited upstream PoE ports. One key point worth understanding: total power across all four ports is ultimately capped by what your upstream switch port can actually deliver.

User Feedback

Buyers generally appreciate how quickly this four-port PoE hub gets up and running — most report it links up within seconds, no fuss involved. The aluminum build draws positive comments too, feeling more substantial than plastic-bodied alternatives at this price point. On the critical side, a recurring concern involves heat when all four ports operate near their power limits simultaneously; the chassis does warm up noticeably under full load. A handful of users also flag inconsistent compatibility with certain older PoE injectors. Connector durability is mostly rated positively, though a few mention the RJ45 ports feel slightly loose after repeated cable swaps. Overall reception skews favorable, with most complaints tied to edge-case power configurations.

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Pros

  • Plug-and-play setup means most users are operational within minutes, no configuration needed.
  • Per-port auto-sensing correctly negotiates PoE or PoE+ power for each connected device independently.
  • True Gigabit throughput keeps HD camera feeds and VoIP traffic running without bandwidth constraints.
  • Broad 802.3af/at compliance ensures compatibility with virtually any PoE switch or injector already in place.
  • Compact aluminum build holds up better than plastic-bodied alternatives at a comparable price point.
  • DC input range of 5-58V allows conversion from non-PoE sources, adding flexibility to legacy setups.
  • Per-port LED indicators make it easy to spot a dead link or power issue at a glance.
  • 328 ft cable reach over Cat5e and above keeps remote or ceiling-mounted installs well within spec.
  • Saves significant cost compared to replacing a switch just to gain a handful of extra PoE ports.

Cons

  • Total power across all four ports is hard-capped by the upstream switch port, which buyers frequently underestimate.
  • The DC adapter for non-PoE source setups is sold separately, adding an unannounced extra cost.
  • No rack-mount option limits deployment flexibility in structured wiring closets or server cabinets.
  • The unit runs noticeably warm under full four-port load, which may raise long-term reliability concerns.
  • RJ45 connectors on some units have been reported to feel slightly loose after repeated cable changes.
  • Occasional compatibility issues with older or non-standard PoE injectors have surfaced in user reports.
  • Zero management features mean there is no way to monitor per-port power consumption or set priorities.
  • Brand recognition is limited, making it harder to assess long-term warranty support or replacement availability.

Ratings

The Closs 1-In-4-Out 4-Port Gigabit PoE Splitter has been evaluated by our AI rating engine after systematically analyzing thousands of verified global buyer reviews, with spam, bot-generated, and incentivized feedback actively filtered out. Scores reflect the full spectrum of real-world experiences — from surveillance installers and IT admins to home lab hobbyists — so both genuine strengths and recurring frustrations are transparently represented. No category has been softened or inflated to favor a particular outcome.

Ease of Setup
93%
The plug-and-play experience holds up in practice for the vast majority of buyers. Installers running security cameras to remote locations report the device linking up within seconds of connecting cables, with zero driver prompts or configuration screens to navigate — a genuine relief for non-technical small business owners.
A small segment of users with older or non-standard PoE injectors reported that the device did not immediately negotiate correctly, requiring them to swap cable order or reboot the upstream switch. This is rare but worth noting for anyone working with legacy or off-brand PoE hardware.
PoE Compatibility
88%
Broad IEEE 802.3af/at compliance translates into genuine cross-brand compatibility in the field. Users pairing this PoE splitter with Ubiquiti, Netgear, TP-Link, and Cisco switches overwhelmingly reported clean handshakes with no manual power class configuration required, which is exactly what you want when deploying across mixed-brand infrastructure.
A handful of reviewers flagged intermittent issues when connecting to proprietary or passive PoE systems that fall outside the standard, such as certain older Mikrotik injectors or budget no-name switches. The Closs splitter follows the spec correctly, but non-compliant upstream hardware can cause unpredictable behavior.
Power Delivery Accuracy
84%
Per-port auto-sensing works reliably under normal mixed-load conditions. IT admins deploying a mix of WiFi 6 access points and standard IP cameras on the same unit report that each port correctly identifies and delivers the right power class — 15.4W for af devices, 30W for at — without any manual intervention or mislabeling.
The most consistent criticism centers on total power budget confusion: when all four ports are under high load simultaneously, buyers expecting 30W times four are often surprised to find their upstream switch port cannot supply that total. This is a fundamental architecture constraint, not a defect, but the product packaging could communicate it far more clearly.
Gigabit Throughput
91%
Real-world throughput testing by home lab users and CCTV installers confirms that all four ports sustain true Gigabit data rates without throttling. HD IP camera streams at 1080p and 4K ran without dropped frames or buffering in reported field deployments, which is a solid result for a device at this price tier.
No meaningful throughput complaints emerged in the feedback pool, though a couple of users noted slight latency spikes when all four ports were simultaneously saturated at maximum bandwidth — an edge case unlikely to affect typical surveillance or VoIP use but relevant for anyone pushing dense data workloads.
Build Quality
78%
22%
The aluminum alloy housing consistently draws positive comparisons to plastic alternatives in the same price range. Users handling the unit describe it as feeling solid and purposeful, not flimsy, and the chassis doubles as a passive heat sink which buyers appreciate during warmer ambient-temperature deployments.
RJ45 connector quality is the most common build complaint — a noticeable subset of reviewers found the ports feel slightly loose after repeated cable insertions, which raises questions about long-term reliability in installations where cables are frequently swapped. For a permanent, set-and-forget install it is less of a concern.
Thermal Management
69%
31%
Under light to moderate loads — two or three ports active at standard PoE wattage — the aluminum chassis manages heat passively and the unit stays barely warm to the touch. Users running IP cameras in typical office or home environments report no heat-related issues after extended operation.
When all four ports are loaded near the PoE+ ceiling simultaneously, the device runs noticeably warm, and buyers who mounted it in enclosed junction boxes or tight cable runs flagged this as a concern. There is no active cooling, and in poorly ventilated spaces the heat buildup is persistent enough that some users repositioned the unit entirely.
Value for Money
86%
For buyers whose alternative is purchasing an entirely new PoE switch just to gain a few extra ports, this four-port PoE hub delivers a compelling return on a modest outlay. Installers expanding existing security systems particularly highlight the cost savings compared to replacing functional upstream hardware.
The value calculation shifts slightly once buyers realize the DC adapter for non-PoE setups is sold separately. Shoppers who assumed everything needed was in the box and then had to order an additional accessory reported feeling misled, and this omission does meaningfully add to the total cost for non-PoE source deployments.
Port Count Utility
82%
18%
Four output ports is the right number for a wide range of practical scenarios — covering a typical four-camera residential security setup or a trio of VoIP phones plus an access point in a single office zone. Users consistently describe the 1-in-4 topology as fitting their actual deployment needs without leaving unused ports.
For larger deployments that need six or eight endpoints from a single uplink, four ports is an obvious ceiling and users in that situation need to daisy-chain units or consider a different solution. A few reviewers wished for a five or six-port variant within the same form factor.
Cable Range Performance
87%
The 328 ft (100m) rated reach holds up well in practice across Cat5e and Cat6 runs according to field installers. Using the device as a mid-run PoE extender — placing it partway along a long cable run to reset the distance counter — is a use case that multiple experienced buyers highlighted as a practical and reliable application.
At the very edge of the 100m limit on older or lower-quality Cat5e, a few users observed marginal link stability, particularly on runs with multiple termination points. The issue is more about cable quality than the device itself, but it is worth flagging for anyone planning runs close to the maximum distance.
LED Status Indicators
74%
26%
Having a dedicated LED per port is genuinely useful during initial setup and when troubleshooting a dead link in the field. Installers in particular appreciate being able to glance at the unit and immediately confirm which ports are active versus which have a cable or device problem, without needing any software.
Several users noted the LEDs are fairly dim in brightly lit environments, making them harder to read at a glance when the unit is mounted at ceiling level or in a well-lit server area. The indicators also do not differentiate between PoE and PoE+ status, which limits their diagnostic depth.
DC Power Flexibility
67%
33%
The 5–58V DC input range is genuinely broad and allows this PoE splitter to operate off a wide variety of external power supplies, which opens up deployment scenarios where no upstream PoE switch exists at all. Users repurposing older non-PoE switches found this feature extended the device's usefulness considerably.
The DC adapter not being included in the box remains a sore point in buyer feedback for this use case. The product listing language is ambiguous enough that a meaningful number of buyers only discovered the omission after delivery, and sourcing a compatible adapter adds friction and cost to what should be a straightforward setup.
Form Factor & Portability
89%
At 135g and roughly the footprint of a large matchbox, the unit is easy to tuck into tight spaces, mount behind a monitor, or drop into a cable tray. Field installers working in ceiling voids or equipment closets appreciate how little space it demands compared to adding a new switch to an already crowded rack.
The lack of any rack-mount option is a legitimate limitation for structured wiring environments. Users managing tidy server cabinets or dedicated AV racks noted they had nowhere clean to mount it permanently, and zip-tying a desktop device to a rack rail is not an elegant long-term solution.
Brand Reliability Perception
61%
39%
Buyers who have had positive experiences report satisfaction with the unit's consistent day-to-day operation once deployed, and there are no widespread reports of early failure or sudden connectivity drops under normal operating conditions within the review window.
Closs is not a recognized name in the networking hardware space, and buyer confidence in long-term warranty support, firmware updates (if ever needed), or replacement unit availability is notably low in feedback. Buyers used to established brands expressed hesitation, and a few reported difficulty reaching support when issues arose.

Suitable for:

The Closs 1-In-4-Out 4-Port Gigabit PoE Splitter is purpose-built for anyone who needs to multiply PoE coverage from a single existing port without touching their upstream switch or pulling new cable runs. Security installers working with pre-run conduit will find it particularly practical — one Ethernet drop to a remote location can now support up to four IP cameras simultaneously. IT staff deploying WiFi 6 access points across a ceiling grid with limited uplink drops face the same bottleneck, and this PoE splitter addresses it cleanly. Small offices rolling out VoIP phones desk by desk can stretch a single PoE port across multiple handsets without buying a larger managed switch. Home lab enthusiasts on a budget who simply want powered ports for a few IoT devices or a secondary AP will also get solid value here. Essentially, if your existing infrastructure already has at least one solid PoE port and you need to branch from it, this four-port PoE hub is a rational, low-friction answer.

Not suitable for:

Buyers who need VLAN segmentation, QoS traffic prioritization, or any layer-2 management features should look elsewhere — the Closs 1-In-4-Out 4-Port Gigabit PoE Splitter is a passive splitter, not a managed switch, and it offers none of those controls. It is also not the right tool when total power demand is high: the upstream switch port caps the entire power budget, so trying to run four 30W PoE+ devices simultaneously is likely to exceed what most single switch ports can actually supply. Users who need rack-mountable hardware for a structured wiring closet will be disappointed, as this unit is strictly a desktop device. Anyone expecting to use it with a non-PoE router or switch without purchasing a compatible DC adapter separately will hit an unexpected cost. Environments that demand guaranteed uptime with redundant power failover should invest in enterprise-grade infrastructure rather than relying on this class of device.

Specifications

  • Port Configuration: The unit provides one PoE-enabled uplink input and four individual PoE output ports for downstream devices.
  • PoE Standard: Fully compliant with IEEE 802.3af (up to 15.4W) and IEEE 802.3at (up to 30W) power-over-Ethernet standards.
  • Data Speed: Each port supports auto-negotiating 10/100/1000 Mbps Gigabit Ethernet throughput.
  • Max Port Power: Each output port delivers up to 15.4W under 802.3af or up to 30W under 802.3at, depending on the connected device.
  • Cable Support: Compatible with Cat5e, Cat6, Cat7, and Cat8 twisted-pair Ethernet cables for both data and power transmission.
  • Max Cable Reach: Supports standard PoE cable runs of up to 328 ft (100 m) from the upstream switch or injector.
  • DC Input Range: Accepts an optional external DC power supply in the 5–58V range for non-PoE-to-PoE conversion scenarios (adapter sold separately).
  • Interface Type: All five ports (one input, four output) use standard RJ45 connectors.
  • Housing Material: The outer shell is constructed from aluminum alloy, providing passive heat dissipation and mechanical durability.
  • Dimensions: The unit measures 4.02″ in length, 2.68″ in width, and 0.67″ in height.
  • Weight: The device weighs 135 g (4.8 oz), making it light enough for flexible desktop or surface placement.
  • Status Indicators: Individual LED indicators on each port display real-time link and power status for quick diagnostics.
  • Configuration: No software, drivers, or management interface required — the device operates fully plug-and-play out of the box.
  • Installation Method: Designed for desktop installation; no rack-mount brackets or ears are included or supported.
  • Power Sensing: Per-port auto-sensing technology independently negotiates the correct power class for each connected device.
  • Backward Compatibility: Works with all 802.3af/at-compliant PoE switches and injectors regardless of brand, requiring no additional configuration.

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FAQ

It really does just plug in. Connect your existing PoE switch or injector cable to the input port, run Cat5e or better to your devices on the output ports, and you are done. There is no web interface, no app, and no driver to install.

In theory each port supports up to 30W, but the total power budget is capped by what your upstream switch port can actually supply. Most single PoE+ switch ports max out at 30W total, so running four high-draw devices simultaneously is likely to overload that budget. Check your switch specs before assuming four full PoE+ loads are viable.

Almost certainly yes. The Closs 1-In-4-Out 4-Port Gigabit PoE Splitter is IEEE 802.3af/at compliant, which is the same standard virtually every major brand uses. As long as your switch outputs standard PoE or PoE+, this splitter will handshake with it correctly.

Yes, but you will need a separate DC power adapter rated between 5V and 58V to inject power into the unit. That adapter is not included in the box, so factor that into your total cost if you are starting from a non-PoE switch.

No, this four-port PoE hub passes through true Gigabit (1000 Mbps) on each port. You are not sharing bandwidth in the way a hub divides it — each port runs at full Gigabit negotiation, so HD camera streams and VoIP traffic should not see any bottleneck from the splitter itself.

The aluminum housing does a reasonable job of passively dissipating heat under normal loads, but it will run noticeably warm when all four ports are powered simultaneously at high wattage. In a tight enclosed space with no airflow, consider whether that heat can escape before mounting it permanently.

Yes, this is actually one of the more practical uses for it. If your upstream switch port is already running at near the 100m limit, you can treat this PoE splitter as a mid-run extender — it re-drives the signal and resets the distance clock for each of the four output ports, giving you another 328 ft per run.

No. This is a passive PoE splitter, not a managed switch. It has no awareness of traffic types, VLAN tags, or QoS policies. If your VoIP deployment relies on VLAN-based voice segmentation, you need a managed switch, not this device.

Each port has its own LED indicator on the unit. A solid light typically confirms an active link, while the light going out or behaving unexpectedly signals a problem with that specific port or cable. It is a simple but effective way to isolate issues without logging into any software.

Cat5e is the minimum and works well for most installs up to 100m. Cat6, Cat7, and Cat8 are all supported too, and any of them will handle both the Gigabit data and PoE power without issue. Avoid using older Cat5 (non-e) cable, as it is not reliably rated for PoE current at this power level.