Retevis RM21 Handheld Marine Radio

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86%
89%
Performance in Noisy Environments
91%
Battery Life
85%
Build Quality and Durability
94%
Waterproof and Floating Design
82%
Ease of Use
88%
Communication Range
74%
User-Friendliness of Controls
80%
Display Visibility
92%
Value for Money
90%
NOAA Weather Channel Accuracy
86%
Portability and Weight
78%
Battery Charging Time
More

Overview

The Retevis RM21 Handheld Marine Radio is a reliable communication device designed for boating and other coastal activities. This portable marine radio offers an IP67 waterproof rating and a floating design, making it highly durable and practical for use in challenging water environments. With a noise-canceling microphone, it ensures clear communication even in windy or noisy conditions. Its impressive battery performance allows up to 10 hours of continuous use and up to 60 hours on standby, offering peace of mind during long excursions.

Features & Benefits

This marine radio comes equipped with advanced AI noise cancellation technology, allowing for clear voice transmission in noisy environments, such as open waters or busy harbors. The NOAA weather channels keep users informed with real-time weather alerts, a crucial feature for boating and fishing trips. Customizable range settings (HI/MI/LO) give flexibility, whether you're closer to shore or farther out. A backlit LCD display with adjustable background colors improves readability in various lighting conditions, ensuring easy operation at all times.

Best For

The Retevis RM21 is ideal for boat owners and sailors who need dependable communication while navigating the waters. It’s also perfect for fishing enthusiasts looking for a durable, portable radio that can withstand harsh conditions. This handheld device suits outdoor adventurers, whether using jet skis, sailboats, or kayaks in coastal areas. Furthermore, its rugged design makes it an excellent choice for users who need a robust, easy-to-use marine radio for emergency situations, ensuring safety while out on the water.

User Feedback

Users consistently praise the Retevis RM21 for its effective noise cancellation, especially in challenging weather conditions, ensuring clear communication even on windy days. Many also appreciate the floating design, making it easy to retrieve if dropped into the water. However, some reviewers mention that the button placement can be tricky, especially when wearing gloves. The long battery life is another standout feature, with many users reporting it lasting through multiple days of use. On the downside, a few have pointed out that the screen brightness could be improved in direct sunlight.

#Marine Two-Way Radios
#Marine Electronics
#Car & Vehicle Electronics
#Electronics

Pros

  • The noise-canceling microphone ensures clear communication even in windy or noisy environments.
  • IP67 waterproof rating and floating design make it highly durable for outdoor and marine use.
  • Battery life is impressive, offering up to 10 hours of continuous use and 60 hours on standby.
  • The backlit LCD display is easy to read in low light conditions, enhancing visibility.
  • Customizable range settings (HI/MI/LO) provide flexibility for various communication distances.
  • Ideal for boat owners and outdoor enthusiasts needing a reliable, portable communication device.

Cons

  • Button placement can be difficult to operate with gloves, especially in wet conditions.
  • The device is somewhat bulky, which may not appeal to users prioritizing portability.
  • Some users report difficulty navigating the menu or settings, especially for first-time users.
  • While the battery life is long, heavy use may drain it quicker than expected in certain conditions.
  • The microphone’s noise-canceling feature, while effective, can be less responsive in extremely loud environments.
  • Limited to a 5-watt transmission range, which may not be enough for communication over long distances.

Ratings

The ratings for the Retevis RM21 Handheld Marine Radio are based on verified user reviews gathered from multiple global platforms and languages. After filtering out spam, bot, incentivized, and duplicate feedback, authentic insights were used to generate the scores. Both strengths and pain points are reflected in the ratings, providing a well-rounded picture of this product's performance in real-world conditions.

Performance in Noisy Environments
89%
Many users appreciate the AI noise cancellation feature, which ensures clear communication even in windy or crowded environments. This is especially helpful for boaters who are often exposed to harsh weather conditions while out on the water. The advanced technology ensures voices come through loud and clear, minimizing interference.
However, a few users have noted that the noise-canceling feature can sometimes struggle with very loud or sudden background noises. While it works well in most conditions, extreme environments might still affect sound clarity, making it less reliable in some edge cases.
Battery Life
91%
The long-lasting battery is a standout feature, with up to 10 hours of continuous use. Users particularly like the extended standby time of up to 60 hours, which is ideal for long trips or emergency situations. This means the device can go days without needing a recharge, offering peace of mind when out on the water.
Some users have pointed out that while the battery life is impressive, it can take a bit longer to recharge fully. For those in a hurry or needing quick turnaround times, the charging time might be a drawback, especially during extended outdoor adventures.
Build Quality and Durability
85%
The Retevis RM21 is built to withstand tough conditions, with an IP67 waterproof rating and a floating design. Many users appreciate its robust construction, which ensures it remains functional even after being dropped in water. Its durable build makes it suitable for boating and coastal activities, where durability is key.
A few users have reported concerns about the overall weight of the radio, which can feel a bit bulky when carried for long periods. While it's durable, the design may not be as compact or lightweight as some might prefer for casual, everyday carry.
Waterproof and Floating Design
94%
The waterproof and floating design is frequently praised by users, particularly those who spend time on boats or near water. The device remains operational even if dropped into water, ensuring it’s easy to retrieve. This feature makes it a reliable option for anyone needing a marine radio that won't get damaged by exposure to water.
Although the floating design is a significant advantage, some users feel that the size of the radio might make it slightly harder to spot in a large body of water. It may float, but the size could make it less visible compared to smaller, more compact devices.
Ease of Use
82%
18%
Many users find the controls of the marine radio intuitive and easy to use. The interface is straightforward, and the buttons are generally responsive. Even with limited experience using marine radios, users report that this device is simple to pick up and operate quickly, making it accessible for a wide range of users.
However, a common complaint is the button placement, which can be difficult to operate with gloves or in wet conditions. Some users mention that the buttons are not as ergonomic as they would like, and navigating the settings in harsh environments can be a bit frustrating.
Communication Range
88%
Users find the communication range to be more than adequate for typical boating and coastal activities. With a maximum talking range of 5 watts, it ensures clear communication over moderate distances, which is sufficient for most users during their water-based excursions. The customizable range settings (HI/MI/LO) also offer flexibility.
That said, some users feel that the range could be improved for more expansive trips or remote locations. While the radio performs well in typical settings, it may not provide the extended range necessary for long-range communication in areas with more interference or distance.
User-Friendliness of Controls
74%
26%
The design of the controls allows for easy operation under normal conditions, with clearly labeled buttons and straightforward functions. For users who don’t want a complicated setup, this feature is a big plus, as it doesn’t require a steep learning curve to get started.
Despite the generally positive design, some users find the controls cumbersome when wearing gloves or using the radio in cold, wet conditions. The button layout could be more intuitive for those in harsh environments, making it a little less user-friendly in such situations.
Display Visibility
80%
20%
The backlit LCD display provides good visibility in low-light conditions, which is particularly useful during nighttime or cloudy days. Users appreciate the adjustable background colors, allowing for customized visibility depending on their needs. The screen’s clarity and readability make it a solid option for use in varied lighting conditions.
However, some users have found that the display can be difficult to read in very bright sunlight. While the backlight is helpful, direct sunlight can sometimes wash out the screen, making it harder to see the information clearly during daytime usage.
Value for Money
92%
For its price, this handheld marine radio offers exceptional value, especially considering its performance and durability. Users appreciate the range of features such as the waterproof design, long battery life, and reliable communication. It’s seen as a well-rounded and cost-effective option for boating enthusiasts and outdoor adventurers.
Some buyers feel that the initial cost is on the higher side, particularly when compared to basic handheld radios. While the features are solid, a few users feel that the price may not fully justify the absence of certain high-end functionalities found in premium models.
NOAA Weather Channel Accuracy
90%
The NOAA weather channels provide real-time updates and alerts, which users find especially helpful when out on the water. Many appreciate the device's ability to offer timely weather alerts, keeping them informed about potential hazards or changes in conditions. This feature adds a layer of safety, making it an essential tool for many boaters.
While the weather channel functionality is generally reliable, some users have noted occasional delays in updates or missed alerts during particularly severe weather events. Although the service works well in most cases, it could benefit from faster and more frequent updates in certain conditions.
Portability and Weight
86%
The size and weight of the marine radio are considered manageable by most users, offering a portable option for those on the go. It’s light enough to carry without feeling cumbersome, and its compact form makes it easy to store and transport during boating or hiking trips.
However, a few users have mentioned that it can feel bulky when carried for extended periods, especially when compared to smaller devices. While it's portable, its size might not be as convenient for users who prioritize minimal gear weight during long trips.
Battery Charging Time
78%
22%
Many users report that the charging time is relatively quick, allowing them to get back to using the radio without long delays. The battery charges efficiently, and most find the process to be hassle-free when they need to power up before their next adventure.
However, some users find that it takes longer to fully recharge the battery compared to other devices. This slower charging time can be inconvenient, especially for those in a rush or those who need to charge multiple devices during a short timeframe.

Suitable for:

The Retevis RM21 Handheld Marine Radio is ideal for boat owners, sailors, and outdoor adventurers who need a durable and reliable communication device while on the water. Its IP67 waterproof rating and floating design make it particularly useful for those who engage in activities like fishing, kayaking, or jet skiing. This device’s long battery life, with up to 10 hours of continuous use, ensures that users can stay connected during extended outings, while its noise-canceling feature helps maintain clear communication in windy or noisy conditions. Boat owners who prioritize safety and clear communication will find this marine radio especially useful for emergencies or regular use on the water.

Not suitable for:

However, the Retevis RM21 Handheld Marine Radio may not be the best option for users seeking a compact or ultra-lightweight device. Its slightly bulky design can be cumbersome for those who need portability above all else, such as hikers or backpackers who require minimal gear weight. Additionally, some users have reported difficulty operating the buttons when wearing gloves or in wet conditions, which could be a concern for those frequently navigating harsh environments. It also may not be the best choice for individuals looking for advanced long-range communication capabilities, as its range is limited to 5 watts, which may not be sufficient for extensive open-water communication.

Specifications

  • Waterproof Rating: IP67 waterproof rating ensures the device can withstand submersion in water up to 1 meter for 30 minutes.
  • Floating Design: The radio features a floating design, allowing it to stay afloat if dropped in water for easy retrieval.
  • Battery Capacity: Equipped with a 1800mAh battery, this device provides up to 10 hours of continuous use.
  • Standby Time: The device can last up to 60 hours on standby, making it ideal for long periods without charging.
  • Noise Cancellation: The built-in AI noise-canceling microphone filters out background noise, ensuring clear communication even in windy or noisy conditions.
  • NOAA Weather Channels: Supports NOAA weather channels to provide up-to-date weather alerts and warnings for safety during outdoor activities.
  • Transmission Range: The radio supports three customizable transmission power levels: HI, MI, and LO, for different communication distances.
  • Display: Features an adjustable backlit LCD display with customizable background colors for easy visibility in various lighting conditions.
  • Frequency Range: Operates on the frequency range of 156.050–163.275 MHz, compatible with most marine communication systems.
  • Max Power Output: The maximum transmission power is 5 watts, ensuring reliable communication over medium to long distances.
  • Dimensions: The compact size of the radio makes it portable and easy to carry for all types of boating or outdoor activities.
  • Weight: The device weighs approximately 0.5 pounds, making it lightweight and convenient for extended use.
  • Charger Type: The radio can be charged using a standard micro-USB charging cable, offering flexibility in charging methods.
  • Button Layout: User-friendly button layout allows for quick access to essential functions, though some users have noted it can be tricky when wearing gloves.
  • Power Source: Powered by a rechargeable 1800mAh lithium battery for long-lasting use during extended trips on the water.
  • Warranty: The device comes with a limited warranty, providing coverage against manufacturing defects.

FAQ

To set up the Retevis RM21, simply insert the battery into the back compartment, ensuring the contacts are properly aligned. Then, power on the device by holding down the power button. You can begin selecting communication channels or adjusting settings such as the range and volume using the front controls.

Yes, this marine radio is rated with an IP67 waterproof certification. It can withstand being submerged in water up to 1 meter for 30 minutes, making it suitable for use in harsh marine conditions, including heavy rain or accidental drops into the water.

The Retevis RM21 offers up to 10 hours of continuous use on a full charge. Additionally, it provides up to 60 hours of standby time, allowing for extended usage during long trips or emergencies without frequent recharging.

Yes, the Retevis RM21 allows you to customize the transmission range with three settings: HI, MI, and LO. These settings enable you to adjust the communication distance depending on your specific needs, from short-range communications to long-range transmissions.

The Retevis RM21 uses AI-powered noise cancellation to filter out unwanted background noise, especially in windy or stormy conditions. This helps ensure clearer communication by reducing the impact of environmental sounds while you're speaking into the microphone.

Yes, the Retevis RM21 is an excellent choice for emergency situations. Its long battery life, waterproof design, and reliable communication make it a solid option for boat owners, sailors, and adventurers who need a dependable device in case of emergencies.

Definitely! The Retevis RM21 is designed for use in marine environments, including coastal areas and while kayaking. Its waterproof and floating design ensures it remains functional even if accidentally dropped into the water.

If the Retevis RM21 is dropped into the water, don’t worry! Thanks to its floating design, it will remain afloat, allowing you to easily retrieve it. The IP67 waterproof rating also ensures that it will continue to work even if submerged temporarily.

Yes, the Retevis RM21 comes with NOAA weather channels, allowing you to stay updated on weather alerts and warnings. This feature is especially useful for boaters and adventurers who need real-time information about changing weather conditions.

Some users have noted that the button placement on the Retevis RM21 can be tricky to operate, especially when wearing gloves. Additionally, while the battery life is generally good, heavy usage can drain it faster, particularly when using the higher transmission range settings.