Introduction
The SANSUI U2 is a versatile and portable wireless Bluetooth speaker designed to deliver an immersive audio experience. Featuring Bluetooth 5.3 for stable connections, it offers multiple playback options including FM radio, USB, TF card, and AUX input. Enjoy dynamic sound quality, a built-in recording function, and customizable RGB lighting. Its compact design and lanyard make it ideal for both indoor and outdoor use.
Safety Information
- Do not expose the speaker to extreme temperatures, direct sunlight, or high humidity.
- Avoid dropping or subjecting the speaker to strong impacts.
- Keep the speaker away from water and other liquids. This product is not waterproof.
- Do not attempt to disassemble or repair the speaker yourself. Contact qualified service personnel.
- Use only the specified charging voltage (DC 5V 1A) to prevent damage.
- Keep out of reach of children.
Package Contents
- SANSUI U2 Wireless Bluetooth Speaker
- Charging Cable (USB)
- User Manual
- Lanyard
Product Overview
The SANSUI U2 speaker features a compact design with a front speaker grille and a control panel on top. The back panel houses various input/output ports and RGB lighting.
Figure 1: Front view of the SANSUI U2 speaker.
Figure 2: Top control panel and electronic display.
Figure 3: Rear ports and RGB lighting.
Button Explanation (Refer to Figure 2)
- Electronic Display
- Number Buttons (0-9)
- Timer Button (定关)
- Power Switch/Play/Pause/Phone Button
- Mode/Loop Button (模式)
- Next Track/Volume+ Button (V+)
- Previous Track/Volume- Button (V-)
- Delete Button (删除)
- Record Button (录音)
Setup
1. Charging the Speaker
- Connect the provided USB charging cable to the DC 5V port on the speaker (refer to Figure 3).
- Plug the other end of the USB cable into a compatible USB power adapter (DC 5V 1A, not included) or a computer's USB port.
- The charging indicator (usually on the display or a dedicated LED) will show the charging status. Charge fully before first use.
2. Powering On/Off
- To power on, press and hold the Power Switch button (04 in Figure 2) until the display lights up.
- To power off, press and hold the Power Switch button again until the display turns off.
Operating Instructions
1. Bluetooth Pairing
Figure 4: Bluetooth 5.3 connectivity for stable audio streaming.
- Power on the speaker. It will automatically enter Bluetooth pairing mode, indicated by a flashing 'BLUE' on the electronic display.
- Enable Bluetooth on your smartphone or other device.
- Search for available Bluetooth devices and select "SANSUI U2" from the list.
- Once paired, the speaker will emit a confirmation tone, and 'BLUE' on the display will stop flashing.
- You can now play audio from your device through the speaker.
2. FM Radio Function
- Press the Mode button (05 in Figure 2) repeatedly until 'FM' appears on the display.
- To auto-scan and save stations, press and hold the Play/Pause button (04 in Figure 2). The speaker will scan and store available FM stations.
- Use the Previous Track (V-) and Next Track (V+) buttons (07 and 06 in Figure 2) to navigate through saved stations.
- Alternatively, use the Number Buttons (02 in Figure 2) to directly input a station frequency.
3. USB/TF Card Playback
Figure 5: Multiple playback modes including USB and TF card, supporting APE, FLAC, WAV, MP3 formats.
- Insert a USB drive into the USB port or a TF card into the TF card slot (refer to Figure 3).
- The speaker will automatically switch to USB or TF card mode and begin playing audio files.
- Supported audio formats include APE, FLAC, WAV, and MP3.
- Use the Previous Track (V-) and Next Track (V+) buttons (07 and 06 in Figure 2) to change tracks.
- Use the Number Buttons (02 in Figure 2) for direct track selection.
4. AUX Input
- Connect one end of a 3.5mm audio cable (not included) to the AUX port on the speaker (refer to Figure 3).
- Connect the other end to the audio output jack of your external device.
- Press the Mode button (05 in Figure 2) until 'AUX' appears on the display.
- Play audio from your external device.
5. One-Key Recording Function
Figure 6: Activating the one-key recording function.
- Ensure a TF card is inserted into the speaker.
- Press the Record button (09 in Figure 2) to start recording.
- Press the Record button again to stop and save the recording.
- To delete a recording, select the recording using the track buttons and then press the Delete button (08 in Figure 2).
6. Scheduled Shutdown (Smart Timing System)
Figure 7: Scheduled shutdown for peaceful sleep.
- Press the Timer button (03 in Figure 2) to activate the scheduled shutdown feature.
- Repeatedly press the Timer button to cycle through available shutdown times (e.g., 15 min, 30 min, 60 min, etc.).
- The speaker will automatically power off after the selected time.
7. RGB Colorful Lights
Figure 8: RGB colorful lights enhancing the atmosphere.
The speaker features RGB colorful lights that illuminate with the rhythm of the music, creating a dynamic visual experience. Specific controls for the RGB lights are typically integrated with the mode or power button, or they may activate automatically with music playback.
8. Volume and Track Control
- Volume: Press the V+ button (06 in Figure 2) to increase volume, and the V- button (07 in Figure 2) to decrease volume.
- Track: In playback modes (Bluetooth, USB, TF card), short press V+ for next track and V- for previous track.
- Play/Pause: Short press the Play/Pause button (04 in Figure 2) to play or pause audio.
Maintenance
- Clean the speaker with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Avoid blocking the speaker grille or ports to ensure proper ventilation and sound quality.
- When not in use for extended periods, store the speaker in a cool, dry place.
- Charge the battery periodically (e.g., once every 3 months) to maintain battery health if stored for a long time.
Troubleshooting
| Problem | Possible Solution |
|---|---|
| Speaker does not power on. | Ensure the battery is charged. Connect to a power source and try again. |
| Cannot pair via Bluetooth. | Make sure the speaker is in Bluetooth pairing mode. Disable and re-enable Bluetooth on your device. Move closer to the speaker. |
| No sound during playback. | Check volume levels on both the speaker and your connected device. Ensure the correct playback mode (Bluetooth, FM, USB, TF, AUX) is selected. |
| FM radio reception is poor. | Try repositioning the speaker to improve signal reception. Perform an auto-scan again. |
| Recording function not working. | Ensure a TF card is properly inserted and has sufficient free space. |
Specifications
Figure 9: SANSUI U2 Product Parameters.
| Feature | Specification |
|---|---|
| Brand | SANSUI |
| Model | U2 |
| Dimensions (L x W x H) | 123mm x 49.2mm x 72.5mm |
| Weight | 320g |
| Battery Capacity | 1200mAh |
| Input Power | DC 5V 1A |
| Peak Power | 15W |
| Bluetooth Version | 5.3 |
| Maximum Wireless Range | <10m |
| Speaker Size | 2.0 inches |
| Audio Crossover | Full-Range |
| SNR (Signal-to-Noise Ratio) | ≥70dB |
| Total Harmonic Distortion | ≤0.5% |
| Playback Functions | Radio, MP3 |
| Supported Formats | APE, FLAC, WAV, MP3 |
| Communication | Bluetooth, AUX, USB, TF Card |
| Special Features | FM Radio, Recording, RGB Lights, Scheduled Shutdown |
| Waterproof | No |
| Certification | CE |
User Tips
- For optimal sound quality, ensure the speaker is placed on a stable surface and not obstructed.
- When using the FM radio, extending the lanyard or placing the speaker near a window can sometimes improve reception.
- To conserve battery life, remember to power off the speaker when not in use.
- Experiment with different audio formats on your TF card or USB drive to find the best sound for your preferences.
- The scheduled shutdown feature is excellent for listening to audio before sleep without worrying about turning it off manually.
Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact information provided by your retailer or the official SANSUI support channels. Keep your purchase receipt as proof of purchase.
