1. Introduction
Thank you for choosing the SANSUI U2 Multi-function Wireless Bluetooth Speaker. This portable speaker is designed to provide high-fidelity sound with versatile playback options, including FM radio, Bluetooth 5.3 connectivity, TF card, and USB playback. Its compact design, built-in recording function, and smart timing system make it an ideal companion for various activities, from outdoor adventures to peaceful nights at home.
Figure 1: SANSUI U2 Speaker with RGB Colorful Lights
2. Product Features
- Bluetooth 5.3 Connectivity: Enjoy stable and lag-free wireless audio streaming from your mobile devices.
- Multi-function Linkage: Seamlessly switch between various modes and functions.
- FM Radio: Tune into your favorite radio stations with clear reception.
- One-Key Recording: Easily record audio directly to a TF card.
- Smart Timing System: Program scheduled shutdowns for peaceful sleep.
- RGB Colorful Lights: Enhance your listening experience with dynamic, rhythm-synced lighting.
- HiFi Sound Quality: Features a speaker and diaphragm combination for dynamic, rich audio.
- Multiple Playback Modes: Supports Bluetooth, USB, TF Card, and AUX input.
- Intelligent Decoder: Compatible with APE, FLAC, WAV, and MP3 audio formats.
- Compact & Portable: Lightweight design (320g) with a convenient lanyard for easy carrying.
- Powerful Battery: Built-in 1200mAh battery for extended playback.
Figure 2: Multi-functional Linkage
3. Package Contents
Please check the package for the following items:
- SANSUI U2 Wireless Bluetooth Speaker
- USB Charging Cable
- User Manual
4. Specifications
| Feature | Specification |
|---|---|
| Model | U2 |
| Brand | SANSUI |
| Dimensions (L x W x H) | 123mm x 48.2mm x 72.5mm |
| Net Weight | 320g |
| Bluetooth Version | 5.3 |
| Maximum Wireless Range | <10m |
| Battery Capacity | 1200mAh |
| Speaker Size | 2.0 inches |
| Peak Power | 15W |
| Input Power | DC 5V 1A |
| SNR (Signal-to-Noise Ratio) | ≥70dB |
| Total Harmonic Distortion | ≤0.5% |
| Audio Crossover | Full-Range |
| Playback Functions | Radio, MP3 |
| Communication | Bluetooth, AUX, USB, TF Card |
| Cabinet Material | Plastic |
| Waterproof | No |
| Support APP | No |
| Voice Control | No |
| Certification | CE |
Figure 3: Product Dimensions and Key Parameters
5. Controls and Interfaces
Familiarize yourself with the buttons and ports on your SANSUI U2 speaker:
Figure 4: Button Explanation
- Electronic Display: Shows current mode, time, or track information.
- Number Buttons (0-9): Used for direct track selection in TF/USB mode or frequency input in FM mode.
- Timer Button: Activates/sets the scheduled shutdown function.
- Mode/Loop Button: Switches between playback modes (Bluetooth, FM, TF, USB, AUX) and toggles loop playback.
- Power Switch/Play/Pause/Phone Button: Long press to power on/off. Short press to play/pause music. Press to answer/end calls in Bluetooth mode.
- Next Track/Volume+ Button: Short press for next track/FM station. Long press to increase volume.
- Previous Track/Volume- Button: Short press for previous track/FM station. Long press to decrease volume.
- Delete Button: Deletes recorded files (requires TF card).
- Record Button: Initiates one-key recording (requires TF card).
Figure 5: Side Ports
- DC 5V Port: For charging the speaker using the provided USB cable.
- AUX Port: For connecting external audio devices via a 3.5mm audio cable.
- USB Port: For playing music from a USB flash drive.
- Headphone Port: For private listening with headphones.
- TF Card Slot: For playing music from a TF (MicroSD) card and for recording.
6. Setup
6.1 Charging the Speaker
Before first use, fully charge the speaker. Connect the provided USB charging cable to the DC 5V port on the speaker and the other end to a USB power adapter (not included) or a computer's USB port. The charging indicator will show the charging status and turn off when fully charged.
6.2 Power On/Off
Long press the Power Switch/Play/Pause/Phone Button to turn the speaker on or off.
6.3 Bluetooth Pairing
- Turn 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' will stop flashing.
Figure 6: Bluetooth 5.3 Connectivity
6.4 TF Card / USB Playback
Insert a TF card or USB flash drive (with supported audio files: APE, FLAC, WAV, MP3) into the respective slot. The speaker will automatically switch to TF card or USB mode and begin playback.
Figure 7: Multiple Playback Modes
6.5 AUX Connection
Connect an external audio device (e.g., MP3 player, computer) to the AUX port using a 3.5mm audio cable. The speaker will automatically switch to AUX mode.
7. Operating Instructions
7.1 Music Playback
- Play/Pause: Short press the Power Switch/Play/Pause/Phone Button.
- Next/Previous Track: Short press the Next Track/Volume+ Button or Previous Track/Volume- Button.
- Volume Adjustment: Long press the Next Track/Volume+ Button to increase volume, or Previous Track/Volume- Button to decrease volume.
- Mode Switching: Short press the Mode/Loop Button to cycle through Bluetooth, FM, TF, USB, and AUX modes.
7.2 FM Radio Operation
- Switch to FM mode using the Mode/Loop Button.
- Auto Scan: Long press the Play/Pause Button to automatically scan and save available FM stations.
- Manual Tuning: Use the Next Track/Volume+ Button or Previous Track/Volume- Button to manually tune to stations.
- Direct Frequency Input: Use the Number Buttons (0-9) to directly enter an FM frequency.
Figure 8: FM Radio Function
7.3 Recording Function
To use the recording function, ensure a TF card is inserted into the speaker.
- Press the Record Button to start recording.
- Press the Record Button again to stop recording.
- Recorded files are saved to the TF card.
- To delete a recording, select the file and press the Delete Button.
Figure 9: One-Key Recording
7.4 Timed Shutdown
The smart timing system allows you to set a scheduled shutdown time.
- Press the Timer Button.
- Use the Number Buttons (0-9) to set the desired shutdown duration (e.g., in minutes).
- Confirm the setting. The speaker will automatically power off after the set time.
Figure 10: Smart Timing System for Sleep
7.5 RGB Colorful Lights
The RGB lights automatically synchronize with the music rhythm, creating a dynamic visual experience. There is no explicit button to control the RGB lights, they are an integrated feature.
8. 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, avoid fully discharging the battery frequently. Charge the speaker regularly, even if not in use for extended periods.
- Avoid Water: The speaker is not waterproof. Keep it away from water and moisture.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not power on | Low battery; Power button not pressed correctly | Charge the speaker; Long press the power button for 3-5 seconds |
| No sound | Volume too low; Incorrect mode; Device not connected | Increase volume; Switch to correct mode (BT, TF, USB, AUX); Ensure device is paired/connected |
| Bluetooth pairing fails | Speaker not in pairing mode; Device Bluetooth off; Too far from speaker | Ensure speaker is in BT mode and flashing 'BLUE'; Turn on device Bluetooth; Move device closer to speaker (<10m) |
| FM radio reception is poor | Weak signal; Environmental interference | Move speaker to a different location; Extend the antenna (if applicable, not explicitly mentioned but common for FM radios) |
| TF card/USB playback not working | Card/drive not inserted correctly; Unsupported file format; Corrupted files | Reinsert card/drive; Ensure files are APE, FLAC, WAV, or MP3; Try different files or card/drive |
| Recording not working | No TF card inserted; TF card full or corrupted | Insert a TF card; Check TF card storage; Try a different TF card |
10. User Tips
- For optimal FM radio reception, try to use the speaker in an open area or near a window.
- When using the recording function, ensure the TF card has sufficient free space.
- The lanyard design makes the speaker easy to carry. Utilize it for outdoor activities to prevent accidental drops.
- Experiment with the RGB lighting in different environments to enhance your music experience.
Figure 11: Lanyard Design for Easy Carry
11. Warranty and Support
SANSUI products are manufactured to the highest quality standards. For any issues or support needs, please contact your retailer or the manufacturer's customer service. Keep your purchase receipt as proof of purchase for warranty claims.
