1. Introduction
Thank you for choosing the SANSUI F51/F50 Portable FM Radio Video Player. This device combines a multi-band radio with a multimedia player, offering FM, Medium Wave (MW), and Short Wave (SW) reception, along with Bluetooth connectivity, video playback, music playback, and e-book reading capabilities. Its portable design and long battery life make it ideal for various uses, from camping to daily entertainment. This manual provides detailed instructions to help you get the most out of your device.

Image: SANSUI F51 Portable Radio with Video Display
2. Safety Information
- Do not expose the device to extreme temperatures, direct sunlight, or high humidity.
- Avoid dropping or subjecting the device to strong impacts.
- Keep the device away from water and other liquids.
- Use only the specified charging cable and power adapter (DC 5V/1A) to prevent damage.
- Do not attempt to disassemble or repair the device yourself. Contact qualified service personnel for assistance.
- Ensure proper ventilation when operating the device.
3. Package Contents
For F51 Model:
- 1 x SANSUI F51 Radio
- 1 x Type-C Charging Cable
- 1 x Instructions Manual
- 1 x Leather Handle
For F50 Model:
- 1 x SANSUI F50 Radio
- 1 x Type-C Charging Cable
- 1 x Hanging Rope
- 1 x Instructions Manual

Image: SANSUI F50 model with antenna extended, showing included accessories (hang rope, charge line, Li battery *3)

Image: SANSUI F51 model with antenna extended, showing included accessories (hang rope, charge line, Li battery *3)
4. Product Overview
The SANSUI F51 and F50 models feature a compact, portable design with a large display screen and intuitive controls. Both models include an extendable antenna for enhanced radio reception, multiple playback options, and a built-in speaker.
Key Features:
- Display Screen: F51 features a 7.0-inch IPS screen; F50 features a 4.3-inch LED screen. Both support 720P/1080P video playback.
- Radio: FM, MW, SW multi-band radio with 360-degree rotating 53cm antenna.
- Audio: F51 has a 3-inch internal magnetic speaker; F50 has a 2.5-inch internal magnetic speaker. Both provide clear sound.
- Connectivity: Bluetooth (F51: v5.3, F50: v5.0), USB flash drive, TF card (F51: dual TF card slots).
- Playback: Supports video, music (MP3, WAV, OGG, APE, FLAC), image (JPG, JPEG, BMP, GIF, PNG), and e-book (TXT, ANSI) formats.
- Controls: Knob-type volume adjustment and channel tuning, digital song selection.
- Power: Detachable 18650 lithium batteries (3x 1200mAh) for over 8 hours of playback. Type-C charging interface.
- Portability: Leather handle (F51) or hanging rope (F50) for easy carrying.

Image: SANSUI F50 and F51 models side-by-side, showing their interfaces.
Controls and Ports:
Refer to the images below for a visual guide to the controls and ports on your SANSUI F51/F50 device. Common elements include:
- Screen: Displays media, radio frequency, menu options.
- Knobs: For volume control and radio tuning.
- Buttons: Number pad for digital song selection, playback controls (play/pause, skip), mode selection (FM/MW/SW, Bluetooth, Video, Music, E-book), menu, and return.
- Ports: USB port, TF card slot(s), 3.5mm headphone jack, Type-C charging port.
- Antenna: Extendable telescopic antenna.
- Battery Compartment: Located on the back for detachable 18650 lithium batteries.

Image: SANSUI F50 highlighting screen, ports, and controls.
5. Setup
5.1 Battery Installation
- Locate the battery compartment on the back of the device.
- Open the battery compartment cover.
- Insert three 18650 lithium batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.

Image: SANSUI F51 Detachable Lithium Battery Installation.
5.2 Charging the Battery
- Connect the provided Type-C charging cable to the charging port on the device.
- Connect the other end of the cable to a DC 5V/1A USB power adapter (not included) or a compatible USB port.
- The charging indicator (if present) will show the charging status.
- A full charge provides over 8 hours of playback time.
5.3 Initial Power-On
- Press and hold the power button (usually located on the side or top) to turn on the device.
- The screen will light up, and the device will enter the default mode (e.g., radio or main menu).
6. Operating Instructions
6.1 Radio Operation (FM/MW/SW)
- Extend the telescopic antenna for optimal reception.
- Press the 'Mode' or 'FM/MW/SW' button to select the desired radio band.
- Use the tuning knob to manually scan for stations or press the 'Auto Scan' button (if available) for automatic channel search.
- Adjust the volume using the volume knob.

Image: SANSUI F50 with extended 53cm antenna for stronger signal.
6.2 Bluetooth Playback
- Press the 'Mode' button to switch to Bluetooth mode. The screen will display a Bluetooth icon or 'BLUE'.
- On your smartphone or other Bluetooth device, search for available devices and select 'SANSUI F51' or 'SANSUI F50'.
- Once paired, you can play audio from your connected device through the radio's speaker.
- The effective Bluetooth range is up to 10 meters.

Image: SANSUI F51 demonstrating Bluetooth connection with a smartphone.
6.3 USB/TF Card Playback
- Download your desired music, videos, images, or e-books onto a USB flash drive or TF card.
- Insert the USB flash drive into the USB port or the TF card into the TF card slot(s).
- The device should automatically detect the storage and switch to the appropriate playback mode (Music, Video, Photo, E-book). If not, select the mode manually from the menu.
- Use the navigation buttons or number pad for digital song selection and playback control.

Image: SANSUI F50 showing USB flash drive insertion.

Image: SANSUI F50 showing TF card insertion.
6.4 Video Playback
The device supports full format 720P high-definition video playback, including RM, H.264HP, Xvid, Mpeg2, and other formats up to 1080P. Ensure your video files are compatible and stored on a USB drive or TF card.

Image: SANSUI F51 screen displaying multimedia options.
Video: SANSUI F51 product demonstration, showing video playback and physical features.
6.5 Music Playback
The device supports full format audio files such as MP3, WAV, OGG, APE, and FLAC. For lyrics display, ensure the corresponding ".LRC" lyrics file is downloaded and stored in the same folder as the audio file.
6.6 E-book Viewing
Supports TXT and ANSI e-book formats. Store your e-book files on a USB drive or TF card and select the E-book option from the menu to view them.
6.7 Headphone Use
Connect 3.5mm wired headphones to the headphone jack for private listening. The device will automatically switch audio output to the headphones.

Image: SANSUI F50 showing earphone connection.
7. Specifications
| Feature | SANSUI F51 (7.0-inch) | SANSUI F50 (4.3-inch) |
|---|---|---|
| Product Size (L*W*H) | 223mm * 34.5mm * 124.5mm | 162.6mm * 33.5mm * 88.9mm |
| Net Weight | 600g | 350g |
| Screen Type | 7.0-inch IPS Screen | 4.3-inch LED Screen |
| Bluetooth Version | 5.3 | 5.0 |
| Max Wireless Range | <10m | <10m |
| Antenna Length | 53cm (rotating lever) | 53cm (rotating lever) |
| FM Frequency Range | 87.5-108MHz (supports campus broadcasting) | 70-108MHz (supports campus broadcasting) |
| MW Frequency Range | 522-1620KHz | 522-1620KHz |
| SW Frequency Range | 2.3-22MHz | 2.3-22MHz |
| Horn Configuration | 3-inch internal magnetic speaker | 2.5-inch internal magnetic speaker |
| Rated Power | 5W | 5W |
| Frequency Response | 100Hz-18KHz | 100Hz-18KHz |
| Battery Type | 3 x 18650 Lithium Battery | 3 x 18650 Lithium Battery (1200mAh each) |
| Input Power Supply | DC 5V/1A (Type-C) | DC 5V/1A (Type-C) |
| Video Format Support | H.264HP, RM, AVI, MKV, VOB, MOV, FLV, ASF, DAT, MP4, 3GP, MPG, MPEG (up to 1080P) | H.264HP, RM, AVI, MKV, VOB, MOV, FLV, ASF, DAT, MP4, 3GP, MPG, MPEG (up to 1080P) |
| Audio Format Support | MP3, WAV, OGG, APE, FLAC (with lyrics display) | MP3, WAV, OGG, APE, FLAC (with lyrics display) |
| Image/E-book Format Support | JPG, JPEG, BMP, GIF, PNG, TXT, ANSI | JPG, JPEG, BMP, GIF, PNG, TXT, ANSI |
| Control Features | Volume control, Playback, Digital song ordering | Volume control, Playback, Digital song ordering |
| Material | Plastic, Metal, Paper | Plastic, Metal, Paper |
8. Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Do not use liquid cleaners or abrasive materials.
- Battery Care: If the device will not be used for an extended period, remove the batteries to prevent leakage. Recharge the batteries regularly to maintain their lifespan.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Antenna: Handle the telescopic antenna gently to avoid bending or breaking.
9. Troubleshooting
- Device does not power on: Ensure batteries are correctly installed and charged. Try connecting the device to a power source using the Type-C cable.
- No sound: Check the volume level. Ensure headphones are not connected if you want sound from the speaker. Verify the audio file format is supported.
- Poor radio reception: Fully extend and adjust the telescopic antenna. Try moving to a location with better signal.
- Bluetooth pairing issues: Ensure the device is in Bluetooth mode and discoverable. Turn off and on Bluetooth on both the radio and your pairing device. Make sure your device is within the 10-meter range.
- USB/TF card not recognized: Ensure the USB drive or TF card is inserted correctly. Check if the file system of the storage device is compatible (e.g., FAT32). Verify that the media files are in supported formats.
- Video playback issues: Ensure video files are in supported formats (H.264HP, RM, AVI, MKV, VOB, MOV, FLV, ASF, DAT, MP4, 3GP, MPG, MPEG) and resolutions (up to 1080P).
10. User Tips
- Media Storage: For optimal performance, use high-quality TF cards and USB flash drives. While the maximum supported capacity is not specified, most similar devices support up to 32GB or 64GB.
- Video Content: The device supports video playback from stored files on TF cards or USB drives. It does not function as a live TV receiver.
- E-book Experience: For a better e-book reading experience, ensure your TXT or ANSI files are well-formatted.
- Portability: Utilize the leather handle (F51) or hanging rope (F50) for secure and convenient transport, especially during outdoor activities.
11. Warranty and Support
SANSUI products are manufactured to high-quality standards. For any issues or technical support, please refer to the contact information provided with your purchase or on the official SANSUI website. Keep your proof of purchase for warranty claims.