1. Introduction
The SANSUI F21 is a versatile mini portable speaker designed for various audio playback needs. It features Bluetooth 5.0 connectivity, FM radio, support for TF cards and USB drives, a recording function, and a 3.5mm headphone jack. Its compact size and lightweight design make it ideal for on-the-go use.
2. Key Features
- Portable Design: Compact and lightweight for easy carrying.
- Multiple Playback Modes: Supports TF Card, USB, Bluetooth, and FM Radio.
- High-Quality Audio: 1.5-inch 3-watt horn with a frequency response of 100Hz-18KHz.
- Bluetooth 5.0: Stable and efficient wireless connectivity.
- Recording Function: Built-in recorder for capturing audio.
- Headphone Jack: 3.5mm output for private listening.
- Lossless Audio Support: Compatible with FLAC and APE formats.
- FM Radio: Wide frequency range (70-87MHz, 87-108MHz).
3. Specifications
| Feature | Detail |
|---|---|
| Brand Name | MouZYuan (SANSUI) |
| Model | F21 |
| Speaker Type | Portable |
| Horn Size | 1.5 inch |
| Output Power (PMPO) | 5 W |
| Input Power (W) | 200-299W |
| Frequency Response | 100Hz-20KHz |
| Bluetooth Version | 5.0 |
| Communication | AUX, USB, Bluetooth |
| Power Source | Battery, USB (DC5V.1A) |
| Battery Capacity | 750mAh |
| Playback Function | Radio, MP3, WAV, FLAC, APE |
| FM Radio Frequency | 70-87MHz, 87-108MHz |
| Control | Volume control, Numbered buttons |
| Display Screen | Yes |
| Material | Plastic |
| Weight | 0.15 kg (approx. 150g) |
| Dimensions | 104 x 26 x 61 mm |
| Maximum Wireless Range | <10m |
| Certification | CE |
4. Package Contents
Ensure all items are present in the package:
- SANSUI F21 Speaker x 1
- TYPE-C Charging Cable x 1
- Hanging Rope x 1
- Instruction Manual x 1
- Certificate x 1
5. Initial Setup
5.1. Charging the Speaker
Before first use, fully charge the speaker. Connect the provided TYPE-C charging cable to the speaker's charging port and the other end to a DC5V.1A USB power adapter (not included) or a computer's USB port.
- The charging indicator light will show the charging status.
- A full charge typically takes a few hours.
5.2. Power On/Off
Locate the power button, usually marked with a power symbol or integrated into a multi-function button. Press and hold to power on or off the device.
6. Operating Instructions
6.1. Mode Selection
Press the 'M' button to cycle through available modes: Bluetooth, FM Radio, TF Card, USB, and Recording.
6.2. Bluetooth Mode
- Switch the speaker to Bluetooth mode using the 'M' button. The display will show "BLUE" or a similar indicator.
- On your mobile device, enable Bluetooth and search for available devices.
- Select "SANSUI F21" from the list to pair.
- Once paired, you can play audio from your device through the speaker.
6.3. FM Radio Mode
- Extend the telescopic antenna for better reception.
- Switch to FM Radio mode using the 'M' button.
- Use the play/pause button to initiate an automatic station scan. The speaker will save available stations.
- Use the previous/next track buttons to navigate between saved stations.
- Manually tune by entering frequency numbers using the keypad.
6.4. TF Card / USB Playback
- Insert a TF card into the TF card slot or a USB drive into the USB port.
- Switch to TF Card or USB mode using the 'M' button. The speaker will automatically detect and play audio files (MP3, WAV, FLAC, APE).
- Use the previous/next track buttons to skip songs.
- Use the numbered keypad to directly select tracks.
6.5. Recording Function
- Ensure a TF card or USB drive is inserted to save recordings.
- Switch to Recording mode using the 'M' button.
- Press the dedicated record button (often a red circle) to start recording.
- Press it again to stop and save the recording.
6.6. Headphone Use
Plug any standard 3.5mm headphones into the headphone jack for private listening. The speaker's internal sound will be muted.
7. Maintenance and Care
- Keep the speaker dry. Do not expose it to rain or moisture.
- Clean the speaker with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Avoid extreme temperatures.
- Do not disassemble the speaker, as this will void the warranty.
- Store in a cool, dry place when not in use for extended periods.
8. Troubleshooting
| Problem | Possible Solution |
|---|---|
| Speaker does not power on. | Ensure the battery is charged. Connect to a power source and try again. |
| No sound. | Check volume levels on both the speaker and the connected device. Ensure correct mode is selected. |
| Cannot pair via Bluetooth. | Ensure the speaker is in Bluetooth mode and discoverable. Turn off and on Bluetooth on your device. Move closer to the speaker. |
| Poor FM radio reception. | Fully extend the telescopic antenna. Try moving the speaker to a different location. Perform an auto-scan again. |
| TF card/USB not playing. | Ensure the card/drive is inserted correctly. Check if audio files are in supported formats (MP3, WAV, FLAC, APE). Try reformatting the storage device if issues persist. |
9. User Tips
- For best FM reception, ensure the antenna is fully extended and the speaker is positioned away from large metal objects or other electronic devices that might cause interference.
- When using a TF card or USB drive, organize your music into folders for easier navigation using the numbered keypad.
- The compact size makes it ideal for outdoor activities; consider using the hanging rope for convenience.
10. Warranty and Support
For warranty information and technical support, please refer to the contact details provided on the product packaging or the official SANSUI website. Keep your purchase receipt as proof of purchase.