1. Introduction
The SANSUI F28 is a versatile portable FM radio and Bluetooth speaker designed for ease of use and high-fidelity sound. It features multiple playback options including FM radio, Bluetooth 5.0, USB disk, and TF card. With its clear LED display, recording function, and long-lasting battery, it's an ideal companion for music and radio enthusiasts.
Image: Front view of the SANSUI F28 Portable FM Radio Bluetooth Speaker.
2. Package Contents
Please check the box for the following items:
- 1 x SANSUI F28 Portable FM Radio Bluetooth Speaker (Host)
- 1 x Type-C Charging Cable
- 1 x Lanyard
- 1 x Instruction Manual (this document)
3. Product Features
- Bluetooth 5.0: Remote wireless connection with stable transmission up to 10 meters.
- FM Radio: 360-degree rotary rod antenna for enhanced signal reception, automatic radio search, and support for campus radio frequencies.
- Multiple Playback Modes: Supports U disk, TF card, and headphone playback.
- High-Definition LED Display: Large LCD screen clearly displays playback time, song title, and lyrics.
- Recording Function: One-button recording and pause playback.
- Digital Song Selection: Direct input for selecting songs or radio frequencies.
- Long Battery Life: Built-in 2200mAh lithium battery provides 8-10 hours of continuous listening.
- Additional Functions: Clock alarm, AB repeat, Chinese and English language switching.
- Sound Quality: Dual 1.5-inch dual magnetic speakers with low-frequency passive enhancement unit for rich sound.
- Portability: Compact size (160MM * 31.4MM * 78.5MM) and lightweight (250g) with a portable lanyard design.
Image: The F28's LED display showing song name and lyrics for clear playback information.
Image: Diagram illustrating the dual 1.5-inch dual magnetic speakers and low-frequency passive enhancement unit.
4. Setup
4.1 Charging the Device
- Connect the provided Type-C charging cable to the charging port on the side of the F28.
- Connect the other end of the cable to a standard USB power adapter (DC 5V/1A, not included) or a computer USB port.
- The LED display will indicate charging status. A full charge takes approximately 3-4 hours and provides 8-10 hours of playback.
Image: The F28 radio connected to a power source via its Type-C charging cable.
4.2 Inserting TF Card / USB Disk
- Ensure the device is powered off before inserting or removing storage media.
- For TF Card: Locate the TF card slot on the side of the device. Insert the TF card gently until it clicks into place.
- For USB Disk: Locate the USB port on the side of the device. Insert the USB flash drive firmly into the port.
- The device will automatically detect and play music files from the inserted media when powered on and in the correct mode.
Image: A TF card being inserted into the F28 radio's dedicated slot.
Image: A USB flash drive inserted into the F28 radio's USB port.
4.3 Extending the Antenna
For optimal FM radio reception, extend the 360-degree rotary rod antenna to its full length (approximately 40cm). Adjust its direction for the best signal.
Image: The F28 radio with its external extended antenna fully raised.
5. Operating Instructions
5.1 Power On/Off
- To power on, press and hold the power button (usually marked with a power symbol).
- To power off, press and hold the power button again.
5.2 Volume Control
Adjust the volume using the roller-type volume knob located on the side of the device. Rotate clockwise to increase volume, counter-clockwise to decrease.
5.3 Mode Switching
Press the 'M' button (Mode button) to cycle through available modes: FM Radio, Bluetooth, USB Disk, and TF Card playback.
5.4 FM Radio Operation
- Switch to FM Radio mode using the 'M' button.
- Automatic Scan: Press and hold the Play/Pause button to initiate an automatic scan for FM stations. The device will save found stations.
- Manual Tuning/Direct Input: Use the number pad to directly input a radio frequency (e.g., for 74.8 MHz, input 7-4-8).
- Use the Previous/Next track buttons to navigate through saved stations.
Image: The F28 radio's number pad, used for direct frequency or song selection.
5.5 Bluetooth Pairing
- Switch to Bluetooth mode using the 'M' button. The device will enter pairing mode, indicated by a flashing Bluetooth icon on the display.
- On your mobile device, enable Bluetooth and search for available devices.
- Select 'SANSUI F28' from the list to pair. Once connected, the Bluetooth icon will stop flashing.
Image: The F28 radio wirelessly connected to a smartphone via Bluetooth 5.0.
5.6 USB Disk / TF Card Playback
- Insert a USB disk or TF card with music files (MP3 format recommended).
- Switch to the appropriate mode (USB or TF Card) using the 'M' button.
- The device will automatically start playing music.
- Use the Previous/Next track buttons to skip songs.
- Digital Song Selection: Use the number pad to directly input the track number (e.g., for the 19th song, input 1-9).
5.7 Recording Function
- Ensure a USB disk or TF card is inserted.
- In music playing mode (USB or TF card), long press the 'REC' (Recording) button to start recording.
- Press the 'REC' button again to end the recording.
- Short press the 'REC' button to play back your recordings.
Image: A finger pressing the recording button on the F28 radio.
5.8 Headphone Use
Connect 3.5mm wired headphones to the headphone jack on the side of the device for private listening.
Image: The F28 radio with 3.5mm wired headphones plugged in.
5.9 Other Functions
- AB Repeat: Use the 'AB' button to set a loop playback for a specific section of a song.
- Clock/Alarm: Refer to the on-screen menu for setting the clock and alarm functions.
- Language Switching: Navigate through the settings menu on the LED display to switch between Chinese and English languages.
6. Maintenance
- Keep the device dry. Avoid exposure to moisture or liquids.
- Clean the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Avoid extreme temperatures.
- Do not disassemble the device. This will void the warranty.
- Store the device in a cool, dry place when not in use for extended periods.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Low battery or no charge. | Charge the device fully using the provided Type-C cable. |
| No sound or low volume. | Volume too low; device muted; incorrect mode. | Adjust volume knob; ensure device is not muted; check mode selection. |
| Poor FM radio reception. | Antenna not extended or poor signal area. | Fully extend and adjust the antenna; try moving to an area with better signal. |
| Bluetooth not connecting. | Device not in pairing mode; out of range; previously paired device connected. | Ensure F28 is in Bluetooth pairing mode; move closer to the F28; disconnect from other devices. |
| USB/TF card not playing. | Incorrect file format; card/disk not inserted correctly; device in wrong mode. | Ensure music files are MP3; re-insert card/disk; switch to correct playback mode. |
| Display shows Chinese characters. | Language setting is Chinese. | Navigate to the settings menu and select English as the display language. |
8. Specifications
| Feature | Detail |
|---|---|
| Model | F28 |
| Dimensions (L*W*H) | 160mm * 31.4mm * 78.5mm |
| Net Weight | 250g |
| Horn Configuration | 2 x 1.5 inch dual magnetic horn + low frequency passive enhancement unit |
| Rated Power | 2 x 5W (Total 10W) |
| Frequency Response | 100Hz - 18KHz |
| FM Frequency Range | 70-108MHz (Default band: 87.5-108MHz) |
| Bluetooth Version | 5.0 |
| Bluetooth Range | Up to 10 meters |
| Battery Capacity | 2200mAh Lithium Battery |
| Battery Life | 8-10 hours (approx.) |
| Input Power Supply | DC 5V / 1A (Type-C) |
| Playback Functions | BT / TF / USB / FM / Headphone playback / Digital song selection / Lossless music playback / Full-mode recording / One-click deletion |
| Display | HD LED LCD screen (lyrics display, clock, alarm) |
| Control | Volume control, Playback, Digital keys |
| Material | Plastic |
| Certification | CE |
9. User Tips
- Language Setting: If your device's display is in Chinese, navigate through the menu options to find the language setting and switch it to English for easier operation.
- Direct Access: Utilize the number pad for quick access to specific FM frequencies or song tracks on your USB/TF card. For example, to tune to 90.5 MHz, press 9-0-5.
- Recording Playback: After recording, a short press of the 'REC' button will allow you to listen to your saved recordings.
- Portability: Make use of the integrated lanyard for secure and convenient carrying during outdoor activities.
Image: The F28 radio with its lanyard, demonstrating its portable design.
10. Warranty and Support
This product comes with a standard manufacturer's warranty. Please retain your proof of purchase for any warranty claims. For technical support or further assistance, please contact your retailer or the manufacturer's customer service.
