1. Product Overview
The Retevis RM15-6W is a 6W VHF marine handheld radio designed for reliable communication in marine environments. It features IP68 waterproofing, a floating design with a flash alarm, built-in noise cancellation, and NOAA weather channel access. This manual provides essential information for the proper setup, operation, and maintenance of your device.

Figure 1: Retevis RM15-6W Marine Radio with charging base and power adapter.
Package Contents
Verify that all items are present in the package:
- RM15 Marine Radio (1 unit)
- Battery (1 unit)
- Base Charger (1 unit)
- Charger Cable (1 unit)
- Belt Clip (1 unit)
- User Manual (1 unit)
2. Setup
2.1 Battery Installation
- Ensure the radio is powered off.
- Align the battery pack with the battery compartment on the back of the radio.
- Gently push the battery into place until it clicks securely.
- Close the battery cover if applicable, ensuring a watertight seal for IP68 protection.
2.2 Charging the Battery
The RM15-6W radio uses a 2000mAh battery and supports Type-C fast charging.
- Connect the charger cable to the base charger.
- Plug the power adapter into a standard electrical outlet.
- Place the radio into the charging cradle. Ensure the charging contacts on the radio align with those on the cradle.
- The charging indicator on the radio or charger will illuminate, indicating charging is in progress.
- A full charge typically takes approximately 3.5 hours with a 5V 2A fast charger, or 6 hours with a 5V 1A charger.

Figure 2: Charging times for the RM15-6W radio.
3. Operating Instructions
Familiarize yourself with the radio's controls and display for effective operation.

Figure 3: RM15-6W Radio Controls and Functions.
| No. | Function |
|---|---|
| 1 | External Headphone Jack |
| 2 | Volume/Power Switch |
| 3 | Flashlight |
| 4 | Display Screen |
| 5 | CH+ (Channel Up) |
| 6 | FAV Button (Favorites) |
| 7 | CH- (Channel Down) |
| 8 | CH/WX Button (Channel/Weather) |
| 9 | PW Button (Power/Lock) |
| 10 | MENU Function Button |
| 11 | Speaker |
| 12 | Water Immersion Detection Point |
| 13 | Charging Contacts |
| 14 | MIC (Microphone) |
| 15 | SCAN/DW Button (Scan/Dual Watch) |
| 16 | SQL/MONI Button (Squelch/Monitor) |
| 17 | Flashlight Button |
| 18 | 16/9 Button (Channel 16/9) |
| 19 | PTT Button (Push-to-Talk) |
| 20 | Charging Interface |
3.1 Power On/Off and Volume
- To power on, rotate the Volume/Power Switch (2) clockwise.
- To power off, rotate the Volume/Power Switch (2) counter-clockwise until it clicks.
- Adjust the volume by rotating the Volume/Power Switch (2).
3.2 Channel Selection
- Use the CH+ (5) and CH- (7) buttons to navigate through the 88 international maritime channels.
- Press the 16/9 Button (18) to quickly switch to Channel 16 (International Maritime Emergency Channel) or Channel 9 (Pre-set CALL Channel). A long press may toggle between them.

Figure 4: The RM15-6W supports 88 International Maritime Channels.
3.3 Transmitting (PTT)
- To transmit, press and hold the PTT Button (19). Speak clearly into the microphone (14).
- Release the PTT button to listen for a response.
3.4 Dual and Triple Watch
These functions allow monitoring of multiple channels simultaneously.
- Dual Watch: Monitors your selected operating channel and Channel 16.
- Triple Watch: Monitors your selected operating channel, Channel 16, and the pre-set CALL channel.
- Activate these modes using the SCAN/DW Button (15) or through the MENU. Refer to the full manual for detailed steps.

Figure 5: Dual and Triple Watch functionality.
3.5 NOAA Weather Channels and FM Radio
- Press the CH/WX Button (8) to access NOAA weather channels, providing real-time weather forecasts and storm warnings.
- The radio also includes a built-in FM radio function for entertainment.

Figure 6: Access to 10 NOAA Weather Channels.
3.6 Flashlight Function
- Press the dedicated Flashlight Button (17) to activate the built-in flashlight for nighttime illumination or emergency use.

Figure 7: Built-in Flashlight Function.
3.7 Key Lock
- To prevent accidental key presses, activate the key lock function. Typically, this is done by a long press of the PW Button (9) or through the MENU.

Figure 8: Key Lock feature.
3.8 FAV Button (Channel Favorites)
- The FAV Button (6) allows quick access to your frequently used channels. Consult the full user manual for instructions on how to program and use favorite channels.

Figure 9: FAV Button for Channel Favorites.
3.9 Noise Reduction
The RM15-6W features two-way electronic noise reduction technology to filter out ambient sounds like ocean waves and engine noise, ensuring clearer communication.

Figure 10: Two-Way Electronic Noise Reduction Technology.
3.10 Floating Design and Flash Alarm
If the radio accidentally falls into the water, its floating design prevents it from sinking. A built-in flashing alarm and audible alert signal its location, aiding retrieval.

Figure 11: Floating Design and Vibration Water Draining.
4. Maintenance
4.1 Cleaning
- Regularly clean the radio's exterior with a soft, damp cloth.
- Avoid using harsh chemicals or abrasive cleaners.
- Ensure all ports and covers are securely closed before cleaning or exposure to water.
4.2 Water Resistance (IP68)
The RM15-6W is IP68 waterproof, meaning it can withstand immersion in up to 1.5 meters of water for 30 minutes. After exposure to saltwater, rinse the radio with fresh water and dry thoroughly.

Figure 12: IP68 Waterproofing.
4.3 Corrosion-Resistant Charging Contacts
The charging contacts are designed to be corrosion-proof and rust-proof, resisting the effects of salt spray and humidity. Keep them clean and dry to ensure optimal charging performance.
4.4 Battery Care
- Avoid fully discharging the battery frequently.
- Store the radio in a cool, dry place when not in use for extended periods.
- If the battery is replaceable, ensure it is correctly seated and the compartment sealed.
5. Troubleshooting
If you encounter issues with your Retevis RM15-6W radio, refer to the following common troubleshooting steps:
- No Power:
- Check if the battery is properly installed and charged.
- Ensure the power switch is turned on.
- Cannot Transmit or Receive:
- Verify that the radio is on the correct channel.
- Check the squelch level (SQL/MONI button). A high squelch level might block weak signals.
- Ensure the PTT button is fully pressed when transmitting.
- Confirm that you are within range of the other radio or station.
- Poor Audio Quality:
- Adjust the volume.
- Check for obstructions around the microphone and speaker.
- Ensure the noise reduction feature is functioning correctly in noisy environments.
- Radio Falls in Water, No Alarm:
- Ensure the water immersion detection point (12) is clear of debris.
- Check battery level, as low power might affect alarm functionality.
If the problem persists, contact Retevis customer support for further assistance.
6. Specifications
| Feature | Detail |
|---|---|
| Model Number | RM15-6W IP68 |
| Item Weight | 10.7 ounces (302.3 Grams) |
| Product Dimensions | 0.2"D x 0.13"W x 0.45"H |
| Batteries | 1 Nonstandard Battery (included) |
| Number of Channels | 88 |
| Talking Range Maximum | 16 Kilometers |
| Voltage | 5 Volts |
| Water Resistance Level | IP68 Waterproof |
| Special Features | 2000mAh Battery, Floating Marine Radio, NOAA Weather and FM, Two-way Electronic Noise Reduction |
7. Warranty and Support
7.1 Warranty Information
Retevis provides a 2-year warranty for the radio body and a 1-year warranty for accessories. Additionally, there is a 30-day no-reason return policy.
Beyond the warranty period, Retevis offers maintenance services, with buyers responsible for associated costs.
7.2 Customer Support
For technical assistance, warranty claims, or any product-related inquiries, please contact Retevis customer support through their official website or the retailer where the product was purchased.