1. Introduction
Thank you for choosing the REMAX RB-M21 Portable Bluetooth Speaker. This manual provides essential information for setting up, operating, and maintaining your device. Please read it carefully before use to ensure optimal performance and longevity of your speaker.
Image 1: Front view of the REMAX RB-M21 Portable Bluetooth Speaker, showcasing its compact design and control panel.
2. Package Contents
Please check the package for the following items:
- 1 x REMAX RB-M21 Bluetooth Speaker
- 1 x User Manual
- 1 x Charging Cable (implied)
- 1 x AUX Cable (implied)
3. Product Features
- Bluetooth 4.2 Connectivity: Enables quick and stable wireless connection with smart memory pairing.
- Durable Design: Constructed with ABS material and an audio nylon mesh surface for comfortable grip and enhanced durability.
- Multiple Playback Modes: Supports AUX input, memory card playback, Bluetooth, and FM radio functions.
- Waterproof Rating: IPX5 rated, offering protection against water splashes.
- Portable: Compact and easy to carry for on-the-go audio.
Image 2: The REMAX RB-M21 speaker, highlighting its portability and compact size, making it easy to carry.
4. Setup
4.1 Initial Charging
- Before first use, fully charge the speaker.
- Connect the charging cable to the speaker's charging port and the other end to a 5V USB power adapter (not included).
- The charging indicator light will illuminate. It will turn off or change color once charging is complete (approximately 3.5 hours).
4.2 Powering On/Off
- To Power On: Press and hold the Power button (①) for a few seconds until you hear an audible prompt and the indicator light turns on.
- To Power Off: Press and hold the Power button (①) again for a few seconds until you hear an audible prompt and the indicator light turns off.
Image 3: Close-up view of the control panel on the REMAX RB-M21 speaker, showing the power, volume, and playback buttons.
5. Operating Instructions
5.1 Bluetooth Pairing
- Ensure the speaker is powered on and in Bluetooth pairing mode (indicated by a flashing LED light).
- On your mobile device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "REMAX RB-M21" from the list of devices.
- Once paired, the speaker will emit an audible confirmation, and the LED light will stop flashing. The speaker will automatically reconnect to the last paired device when powered on, if within range.
5.2 AUX Input Mode
- Connect one end of a 3.5mm audio cable (AUX cable) to the speaker's AUX port.
- Connect the other end of the AUX cable to the audio output jack of your external device.
- The speaker will automatically switch to AUX mode. Control playback from your connected device.
5.3 Memory Card Playback
- Insert a compatible memory card (e.g., microSD card) into the speaker's card slot.
- The speaker will automatically detect the card and begin playing audio files.
- Use the speaker's playback controls (Play/Pause, Next/Previous Track) to manage your music.
5.4 FM Radio Mode
- Switch the speaker to FM mode (usually by pressing a Mode button, if available, or it might be part of the automatic mode cycling).
- Press the Play/Pause button to initiate an automatic scan for FM stations. The speaker will save detected stations.
- Use the Next/Previous Track buttons to navigate between saved FM stations.
5.5 Volume and Playback Controls
- Volume Up: Press the '+' button.
- Volume Down: Press the '-' button.
- Play/Pause: Press the Play/Pause button (►⏸).
- Next Track: Press and hold the '+' button (or a dedicated next track button).
- Previous Track: Press and hold the '-' button (or a dedicated previous track button).
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the speaker's surface. Do not use abrasive cleaners or solvents.
- Water Resistance: The speaker has an IPX5 waterproof rating, meaning it is protected against low-pressure water jets from any direction. Do not submerge the speaker in water. Ensure all port covers are securely closed before exposure to water.
- Storage: Store the speaker in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge the speaker regularly, even if not in use for extended periods.
7. Troubleshooting
| Problem | Possible Solution |
|---|---|
| Speaker does not power on. | Ensure the battery is charged. Connect the speaker to a power source and try again. |
| Cannot pair via Bluetooth. |
|
| No sound. |
|
| Poor FM radio reception. | Reposition the speaker to improve signal reception. Some environments may have weaker signals. |
8. Specifications
| Model Name | REMAX RB-M21 |
| Bluetooth Version | V4.2 |
| Battery Capacity | 2200mAh |
| Effective Distance | 10 meters / 32.8 feet |
| Output Wattage | 3.5W * 2 |
| Signal-to-Noise Ratio (PSNR) | 76dB |
| Charging Time | Approximately 3.5 hours |
| Charging Voltage | 5V 0.7-1A |
| Playback Time | 4-5 hours (at maximum sound) |
| Microphone Sensitivity | -42dB ± 2dB |
| Frequency Response | 65Hz-20KHz |
| Input Sensitivity | 850mV ± 30mV |
| Waterproof Rating | IPX5 |
| Material | ABS, Acrylonitrile Butadiene Styrene |
| Control Method | Touch |
| Compatible Devices | Smartphone, Tablet |
9. Warranty and Support
This product may be covered by a warranty policy. For detailed warranty information, terms, and conditions, please refer to the documentation provided at the time of purchase or contact your retailer. Specific warranty details are not included in this manual.
For technical support or further assistance, please contact the customer service department of your retailer or the manufacturer.
