1. Introduction
Thank you for choosing the SUPNIU A21 Bluetooth Speaker. This portable speaker is designed to deliver a powerful audio experience with its dual woofers and tweeters, vibrant LED lights, and versatile connectivity options. Please read this manual carefully to ensure proper use and maintenance of your device.
Image 1: SUPNIU A21 Bluetooth Speaker and included remote control. The speaker is black with two large circular LED-lit speaker grilles and a control panel in the center. A black remote control is shown to the right.
2. Package Contents
Ensure all items are present in the package:
- 1 x SUPNIU A21 Bluetooth Speaker
- 1 x Remote Control (requires 2 AAA batteries, not included)
- 1 x AUX Cable
- 1 x USB Charging Cable
- 1 x User Manual
3. Setup
3.1 Charging the Speaker
Before first use, fully charge the speaker. Connect the supplied USB charging cable to the speaker's DC 5V input port and the other end to a compatible USB power adapter (not included). The charging indicator will illuminate. A full charge takes approximately 3 hours.
3.2 Remote Control Battery Installation
Insert two AAA batteries (not included) into the remote control, observing the correct polarity (+/-).
4. Operating Instructions
4.1 Power On/Off
Locate the power switch on the control panel. Slide it to the "ON" position to power on the speaker. Slide it to "OFF" to power off.
4.2 Bluetooth Connection
- Turn on the speaker. It will automatically enter Bluetooth pairing mode, indicated by a flashing Bluetooth icon on the display.
- Enable Bluetooth on your smartphone, tablet, or other Bluetooth-enabled device.
- Search for "A21" in the list of available devices and select it to pair.
- Once successfully paired, the speaker will emit a confirmation sound, and the Bluetooth icon will stop flashing.
Image 2: SUPNIU A21 Bluetooth Speaker showing its control panel with volume, bass, and treble tuning knobs, along with icons for various input options like Bluetooth, AUX, MicroSD, USB, and FM radio.
4.3 AUX Input Mode
Connect one end of the supplied 3.5mm AUX cable to the AUX input port on the speaker and the other end to the audio output jack of your external device (e.g., MP3 player, computer). The speaker will automatically switch to AUX mode.
4.4 USB/TF Card Playback
Insert a USB flash drive or a TF (MicroSD) card into the respective port on the speaker. The speaker will automatically detect the storage device and begin playing audio files.
4.5 FM Radio Mode
Press the "Mode" button on the speaker or remote control to switch to FM radio mode.
- Automatic Scan: Press and hold the "Play/Pause" button to automatically scan and save available FM stations.
- Manual Tuning: Use the "Previous/Next" buttons to manually tune to specific frequencies.
Image 3: The SUPNIU A21 Bluetooth Speaker positioned outdoors on the back of a pickup truck, demonstrating its portability and FM radio capability. Two individuals are seated near the speaker.
4.6 LED Lights Control
The speaker features colorful LED lights that synchronize with the music. To control the lights, double-click the "Play/Pause" button on the speaker or use the dedicated light control button on the remote control.
Image 4: The SUPNIU A21 Bluetooth Speaker in a vibrant party setting, showcasing its colorful LED lights that enhance the atmosphere. People are seen dancing in the background.
4.7 Sound Adjustment (EQ)
Use the dedicated knobs on the control panel or the EQ settings on the remote control to adjust master volume, bass, and treble. The speaker offers various EQ sound effects to optimize audio for different music genres.
Image 5: The SUPNIU A21 Bluetooth Speaker surrounded by images representing different music genres (Country, Classical, Popular, Jazz, Rock, Normal), illustrating its versatile EQ sound effects.
4.8 Microphone Connection (Karaoke Function)
The speaker supports microphone input for karaoke. Connect a compatible microphone (not included) to the microphone input jack. Adjust microphone volume and echo using the dedicated controls on the speaker or remote.
5. Maintenance
- Cleaning: Use a soft, dry cloth to clean the speaker's surface. Do not use abrasive cleaners or solvents.
- Storage: Store the speaker in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, charge the speaker regularly, even if not in frequent use. Avoid fully discharging the battery for extended periods.
- Water Resistance: This speaker is not waterproof. Avoid exposure to water or high humidity.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Battery is low or depleted. | Charge the speaker fully. |
| No sound | Volume is too low; incorrect mode selected; device not paired (Bluetooth). | Increase volume; switch to correct input mode (Bluetooth, AUX, USB/TF); re-pair Bluetooth device. |
| Bluetooth connection unstable | Device is too far from speaker; interference; low battery. | Move device closer (within 30m); avoid obstacles; charge speaker. |
| FM radio poor reception | Weak signal; environmental interference. | Adjust speaker position; try automatic scan again. |
| LED lights not working | Lights are turned off. | Double-click the Play/Pause button or use the remote to turn lights on. |
7. Specifications
| Feature | Detail |
|---|---|
| Model | A21 |
| Output Power | 60W (Peak 80W) |
| Speaker Driver Size | 3 inches (x4) |
| Frequency Response | 80Hz - 20KHz |
| Input Voltage | DC 5V |
| Battery Capacity | 8000mAh |
| Playback Time | Approx. 6-10 hours (depending on volume) |
| Charging Time | Approx. 3 hours |
| Bluetooth Version | 5.0 |
| Wireless Range | Up to 30 meters (100 feet) |
| Dimensions (L x W x H) | 19 x 23 x 33 cm (approx. 6 x 8.3 x 11.8 inches) |
| Weight | 2.7 kg |
| Supported Functions | Bluetooth, MP3 Player, FM Radio, TF Card, AUX, USB, Remote Control, EQ, Karaoke |
Image 6: An exploded diagram illustrating the internal speaker configuration of the SUPNIU A21, highlighting its four speakers, including dual woofers and dual tweeters, designed for 360-degree stereo sound.
8. Warranty and Support
The SUPNIU A21 Bluetooth Speaker comes with a limited warranty. Please refer to the warranty card included in your package for specific terms and conditions. For technical support or customer service inquiries, please contact your retailer or visit the official SUPNIU website.
9. Safety Information
- Do not expose the speaker to extreme temperatures, humidity, or direct sunlight.
- Do not disassemble, repair, or modify the device yourself. This will void the warranty.
- Keep the speaker away from strong magnetic fields.
- Use only the provided or recommended charging cables and adapters.
- Avoid dropping or subjecting the speaker to strong impacts.
