1. Product Overview
The Portronics Decibel 21 is a 10W wireless Bluetooth soundbar designed to enhance your audio experience. It features multi-color LED lights, True Wireless Stereo (TWS) functionality, a built-in microphone, FM radio, and multiple connectivity options including USB, 3.5mm Aux, and Micro SD card slots. Its compact design and durable battery make it suitable for various environments.
Image 1.1: Front view of the Portronics Decibel 21 Soundbar with LED lights.
Key Features:
- 10W Audio Output: Delivers clear and powerful sound.
- Bluetooth 5.0: For seamless wireless connectivity.
- True Wireless Stereo (TWS): Connect two Decibel 21 soundbars for enhanced stereo sound.
- Multi-Color LED Lights: Dynamic lighting effects to complement your audio.
- Multiple Playback Modes: Bluetooth, AUX, USB, Micro SD, FM Radio.
- Built-in Microphone: For hands-free calling.
- 1800mAh Battery: Provides extended playback time.
- Compact and Portable Design: Easy to carry and place.
2. What's in the Box
Please check the package contents upon unboxing to ensure all items are present:
- 1x Portronics Decibel 21 Wireless Soundbar
- 1x Type-C Charging Cable
- 1x Aux Cable
- 1x User Manual (this document)
3. Product Components and Controls
Familiarize yourself with the various parts and control buttons of your Decibel 21 soundbar.
Image 3.1: Top and rear view illustrating control buttons and connectivity ports.
Top Panel Controls:
- Power Button: Long press to power on/off. Short press to change mode.
- Play/Pause Button: Play or pause audio. Answer/end calls.
- Previous/Volume Down (-): Short press for previous track, long press to decrease volume.
- Next/Volume Up (+): Short press for next track, long press to increase volume.
- Multi-function Button: (Specific functions may vary by mode, e.g., TWS pairing, FM scan).
Rear Panel Ports:
- Microphone (Mic) Port: For external microphone input (if applicable).
- AUX-in Port: Connect external audio devices via 3.5mm audio cable.
- Type-C Charging Port: For charging the soundbar.
- Micro SD Card Slot: Insert a Micro SD card for direct audio playback.
- USB Port: Insert a USB drive for direct audio playback.
4. Setup Guide
4.1 Charging the Soundbar
- Connect the provided Type-C charging cable to the soundbar's charging port.
- Connect the other end of the cable to a USB power adapter (not included) or a computer's USB port.
- The LED indicator will show charging status and turn off when fully charged.
Image 4.1: Illustration of the soundbar's 1800mAh battery capacity.
4.2 Powering On/Off
- To power on, long press the Power button until the LED lights illuminate.
- To power off, long press the Power button again until the LED lights turn off.
4.3 Bluetooth Pairing
- Ensure the soundbar is powered on and in Bluetooth mode (indicated by a flashing blue LED). If not, short press the Power button to cycle modes until Bluetooth mode is active.
- On your device (smartphone, tablet, laptop), enable Bluetooth and search for available devices.
- Select "Portronics Decibel 21" from the list.
- Once paired, the LED indicator will stop flashing and remain solid blue.
Image 4.2: Soundbar connected wirelessly to a laptop via Bluetooth.
4.4 True Wireless Stereo (TWS) Pairing
TWS allows you to connect two Decibel 21 soundbars for a synchronized stereo audio experience.
- Ensure both Decibel 21 soundbars are powered on and in Bluetooth mode, but not yet paired to any device.
- On one of the soundbars, long press the Multi-function button (or TWS button if present) until you hear an indication sound.
- The two soundbars will automatically search and pair with each other. A successful connection will be indicated by an audible prompt.
- Once paired, connect your device to one of the soundbars via Bluetooth as described in Section 4.3. Both soundbars will now play audio simultaneously.
Image 4.3: Two Decibel 21 soundbars connected via TWS for 20W clear sound.
4.5 Other Connectivity Modes
Short press the Power button to cycle through the following modes:
- AUX Mode: Connect an external audio device using the 3.5mm AUX cable. The soundbar will automatically switch to AUX mode when the cable is inserted.
- USB Mode: Insert a USB flash drive into the USB port. The soundbar will automatically detect and play audio files from the drive.
- Micro SD Mode: Insert a Micro SD card into the Micro SD slot. The soundbar will automatically detect and play audio files from the card.
- FM Radio Mode: In FM mode, the soundbar will automatically scan and save available radio stations. Use the Previous/Next buttons to navigate between stations.
5. Operating Instructions
5.1 Basic Audio Playback
- Play/Pause: Short press the Play/Pause button.
- Volume Adjustment: Long press the '+' button to increase volume, long press the '-' button to decrease volume.
- Track Navigation: Short press the '+' button for the next track, short press the '-' button for the previous track.
5.2 Answering Calls (Bluetooth Mode)
- When a call comes in, the soundbar will ring. Short press the Play/Pause button to answer the call.
- To end a call, short press the Play/Pause button again.
- To reject a call, long press the Play/Pause button.
5.3 LED Light Modes
The soundbar features multi-color LED lights that change dynamically. Specific controls for changing light modes or turning them off may be integrated with the Multi-function button or a dedicated light button (refer to product packaging or quick start guide for exact button mapping if available).
Image 5.1: The soundbar displaying its multi-color LED lights.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the surface of the soundbar. Do not use abrasive cleaners or solvents.
- Storage: Store the soundbar in a cool, dry place away from direct sunlight and extreme temperatures when not in use for extended periods.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge the device regularly, even if not in use.
- Water Resistance: The product is listed as waterproof. However, avoid submerging it in water or exposing it to heavy rain to prevent damage.
7. Troubleshooting
If you encounter any issues with your Portronics Decibel 21 soundbar, please refer to the following table for common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Soundbar does not power on. | Low battery; Power button not pressed correctly. | Charge the soundbar. Long press the Power button. |
| Cannot pair via Bluetooth. | Soundbar not in pairing mode; Device Bluetooth off; Too far from device. | Ensure soundbar is in Bluetooth pairing mode (flashing LED). Turn on device Bluetooth. Move device closer to soundbar (within 10 meters). |
| No sound from soundbar. | Volume too low; Incorrect mode selected; Device not playing audio. | Increase volume on soundbar and connected device. Ensure correct input mode (Bluetooth, AUX, USB, SD). Check if audio is playing on the connected device. |
| TWS pairing failed. | Soundbars already paired to a device; Too far apart. | Ensure both soundbars are unpaired from any device. Place them close to each other. Repeat TWS pairing steps. |
| FM radio not working or poor reception. | Weak signal; Interference. | Move the soundbar to a location with better signal. Try rescanning for stations. |
8. Specifications
Detailed technical specifications for the Portronics Decibel 21 Soundbar:
| Feature | Detail |
|---|---|
| Model Name | Decibel 21 |
| Model Number | POR-1405 |
| Speaker Type | Soundbar |
| Audio Output Power | 10 Watts |
| Connectivity Technology | Bluetooth 5.0, Auxiliary, USB, Micro SD, FM Radio |
| Battery Capacity | 1800 mAh Lithium Polymer |
| Product Dimensions | 8.5D x 43W x 9H Centimeters |
| Item Weight | 1.5 kg |
| Water Resistance Level | Waterproof |
| Included Components | Soundbar, Type-C Charging Cable, Aux Cable, User Manual |
| Manufacturer | Portronics |
| Country of Origin | China |
Image 8.1: Diagram showing the dimensions of the Portronics Decibel 21 Soundbar.
9. Warranty and Support
The Portronics Decibel 21 Soundbar comes with a standard brand warranty. For detailed information regarding warranty terms, service, or technical support, please refer to the official Portronics website or contact their customer service.
You can also find additional support and product information by visiting the Portronics Store on Amazon.
For any issues not covered in this manual, please reach out to authorized service centers or customer support for assistance.
