1. Introduction
Thank you for purchasing the SANSUI F35 Retro Wireless Bluetooth Speaker. This portable speaker offers high-fidelity stereo sound with a powerful subwoofer, multiple playback modes, and a built-in FM radio. Please read this manual carefully before use to ensure proper operation and to maximize your listening experience.

2. Package Contents
- Bluetooth Speaker × 1
- Charging Cable × 1
- User Manual × 1
3. Product Features & Overview
The SANSUI F35 speaker combines retro aesthetics with modern functionality, offering a versatile audio experience.
- High-Fidelity Sound: Enjoy HiFi sound quality with a powerful 5W speaker and an independent bass diaphragm for shocking bass.
- Multiple Playback Modes: Supports Bluetooth 5.3, TF card playback, AUX audio input, USB drive playback, and FM radio.
- Long Battery Life: Equipped with a 2400mAh battery, providing approximately 8 hours of playback time, 3 hours charging time, and 120 hours standby time.
- Recording Function: Supports one-click recording to a memory card, ideal for classroom notes, outdoor events, or travel.
- Hands-Free Calls: Built-in microphone allows for direct calls without needing to hold your phone.
- Portable Design: Compact and lightweight for easy carrying.






4. Button Functions
- Power Button: Long press for 3 seconds to turn on/off. Short press to play/pause.
- Volume +: Short press to increase volume. Long press for next song.
- Volume -: Short press to decrease volume. Long press for previous song.
- Mode Button: Switch between Bluetooth and AUX mode.
- LED Indicator:
- Blue flashing: Pairing mode
- Blue always on: Connected
- Red: Charging
5. Operating Instructions
5.1. Bluetooth Connection
- Long press the Power button to turn on the speaker.
- The LED indicator flashes blue, indicating pairing mode.
- Open Bluetooth on your phone, search for the speaker, and connect.
- After successful connection, you can play music and answer calls.
5.2. AUX Mode
- Connect a 3.5mm audio cable to the speaker and your device.
- The speaker will automatically switch to AUX mode.
5.3. Charging
- Connect the charging cable to the speaker and a power adapter (not included).
- A red light indicates that the speaker is charging.
- The red light turning off means the speaker is fully charged.
6. Specifications
| Feature | Specification |
|---|---|
| Product Name | Portable Bluetooth Speaker |
| Brand | SANSUI |
| Model | F35 |
| Battery Capacity | 2400mAh |
| Output Power | 5W |
| Bluetooth Version | 5.3 |
| Charging Port | USB-C / Micro USB |
| Playing Time | 4-10 hours (depending on volume) |
| Charging Time | 2-3 hours |
| Voltage Range | USB (5-20V DC) |
| Maximum Wireless Range | 10m-20m |
| Frequency Range | 100Hz-20KHz |
| Signal to Noise Ratio | ≥ 70dB |
| Audio Crossover | Full-Range |
| Number of Loudspeaker Enclosure | 1 |
| Cabinet Material | Plastic (ABS) |
| Built-in Microphone | Yes |
| Support Memory Card | Yes (TF card) |
| Input/Output | USB, AUX |
| External Dimensions | 120 * 66 * 40 mm |
7. Maintenance
To ensure the longevity and optimal performance of your SANSUI F35 speaker, please follow these maintenance guidelines:
- Keep the speaker clean by wiping it with a soft, dry cloth.
- Avoid exposing the speaker to extreme temperatures, direct sunlight, or high humidity.
- Do not use harsh chemicals or abrasive cleaners.
- Store the speaker in a cool, dry place when not in use for extended periods.
8. Troubleshooting
- Cannot connect Bluetooth: Restart both the speaker and your phone, then attempt to reconnect.
- No sound: Check the speaker's volume level and ensure it is in the correct connection mode (Bluetooth or AUX).
- Battery runs out fast: Ensure the speaker is fully charged. Lower the volume during playback to conserve battery life.
9. Warning & Safety Instructions
WARNING: Risk of fire, explosion, and burns.
Small parts are included. Keep away from children under 3 years old to prevent choking risk.
- Do not disassemble, puncture, or throw the battery into fire.
- Do not use the speaker in high temperature, humid, or dusty environments.
- Do not play at maximum volume for a long time to avoid hearing damage.
- Keep the speaker away from children under 3 years old to prevent choking hazard.
- Stop using immediately if there is overheating, smoke, or abnormal smell.
10. User Tips
- For optimal sound quality, ensure the speaker is placed on a stable surface.
- When using the recording function, make sure a compatible memory card is inserted and has sufficient free space.
- To extend battery life, avoid fully discharging the battery frequently. Charge it regularly.
11. Warranty & Support
This product comes with a 3-month warranty.
For any support inquiries, please contact customer service via email: support@123.com.
A detailed user manual in PDF format is also available for download: Download User Manual (PDF)





