1. Introduction
The Sansui F51/F50 is a versatile portable multimedia player designed to provide a rich audio and visual experience. It combines a full-band FM/MW/SW radio with a high-definition screen for video and picture playback, alongside MP3 music playback, Bluetooth connectivity, and support for USB and TF card media. Its retro design and portable form factor make it an ideal companion for both indoor and outdoor use.
2. Key Features
- Full-Band Radio: Supports FM, MW, and SW frequencies with automatic channel search.
- High-Definition Screen: Available in 4.3-inch (F50) or 7.0-inch (F51) for clear video, picture, and e-book display.
- Bluetooth 5.0: Stable wireless connection up to 10 meters for audio streaming.
- Multiple Playback Options: Supports U disk (USB flash drive) and dual TF card insertion for music, video, pictures, and e-books.
- Headphone Jack: 3.5mm wired headphone support for private listening.
- Detachable Battery: Features 3x 1800mAh replaceable batteries, offering 8-10 hours of continuous listening on a full charge.
- Portable Design: Lightweight (approx. 350g) with a humanized lanyard design for easy carrying.
- Digital Song Requesting: Convenient feature for selecting specific tracks.
- Recording Function: Allows for audio recording.
- Extended Antenna: A 53cm external antenna enhances radio signal reception.
3. Package Contents
Please check the box for the following items:
- Sansui F51/F50 Multimedia Player Unit
- 3 x 1800mAh Detachable Batteries
- USB Charging Cable
- User Manual (this document)

4. Product Overview
Familiarize yourself with the device's components and controls.


Controls and Ports:
- Screen: High-definition display for media playback and menu navigation.
- Number Pad: For digital song requesting and direct frequency input.
- Control Knobs: Typically for volume, tuning, and menu navigation.
- Power Switch: Located on the side for turning the device on/off.
- Headphone Jack (3.5mm): For connecting wired headphones.
- DC 5V Port: For charging the device using the provided USB cable.
- USB Port: For connecting a USB flash drive (U disk) for media playback.
- TF Card Slots (TF1, TF2): For inserting TF (MicroSD) cards for media playback.
- Antenna: Extendable antenna for improved radio reception.
5. Setup
5.1 Battery Installation
- Locate the battery compartment on the back of the device.
- Gently slide or unclip the battery cover to open it.
- Insert the three 1800mAh batteries, ensuring correct polarity (+ and - terminals match the markings inside the compartment).
- Close the battery cover securely.

5.2 Charging the Device
- Connect the provided USB charging cable to the DC 5V port on the side of the player.
- Connect the other end of the USB cable to a compatible USB power adapter (e.g., 5V/1A phone charger) or a computer USB port.
- The charging indicator (if present) will illuminate. A full charge typically provides 8-10 hours of continuous listening.

6. Operating Instructions
6.1 Power On/Off
Slide the power switch located on the side of the device to turn it on or off.
6.2 Radio Operation (FM/MW/SW)
- Extend the 53cm antenna fully for optimal signal reception.
- Press the 'FM', 'MW', or 'SW' button to select the desired radio band.
- Use the tuning knob or the automatic channel search function to find radio stations. The frequency will be displayed on the screen.

6.3 Bluetooth Playback
- Press the 'Bluetooth' button or navigate through the menu to select Bluetooth mode. The screen will display 'BLUE' or a Bluetooth icon.
- On your mobile device, enable Bluetooth and search for available devices.
- Select 'SANSUI' (or similar device name) from the list to pair.
- Once paired, you can stream audio from your mobile device to the player within a 10-meter range.

6.4 USB / TF Card Playback
- Download your desired songs, videos, pictures, or e-books to a USB flash drive or TF card.
- Insert the USB flash drive into the USB socket or the TF card into one of the TF card slots (TF1 or TF2).
- The device should automatically detect the media and switch to the appropriate playback mode. If not, select 'U disk playback' or 'TF card playback' from the menu.
- Use the navigation buttons (play/pause, skip forward/backward) and the number pad for digital song requesting.


6.5 Headphone Playback
Connect any standard 3.5mm wired headphones into the headphone jack on the side of the device for private listening.

6.6 Volume Control
Use the dedicated volume control knob(s) on the device to adjust the audio output level.
6.7 Multimedia Playback (Video, Pictures, E-books)
When playing media from USB or TF card, the large screen display allows you to navigate through different content types:
- Play Music: Access your audio files.
- Play Video: Watch video content.
- Picture Browsing: View image files.
- Watch E-books: Read digital books.

7. Maintenance
- Keep the device dry and away from moisture.
- Clean the exterior with a soft, dry cloth. Avoid using harsh chemicals or abrasive cleaners.
- Protect the screen from scratches.
- Avoid exposing the device to extreme temperatures or direct sunlight for prolonged periods.
- When not in use for an extended period, remove the batteries.
8. Troubleshooting
- No Power: Ensure the batteries are correctly installed and fully charged. Connect to a power source to check if it powers on.
- No Sound: Check the volume level. Ensure headphones are properly plugged in if using them.
- Poor Radio Reception: Fully extend the antenna. Try moving to a different location to improve signal.
- Bluetooth Not Connecting: Ensure the device is in Bluetooth pairing mode and your external device's Bluetooth is enabled and searching. Make sure the devices are within the 10-meter range.
- Media Not Playing from USB/TF Card: Ensure the media is in a supported format. Check if the USB drive or TF card is properly inserted.
9. Specifications
| Feature | Specification |
|---|---|
| Model | MR-50 (F50/F51 series) |
| Input Voltage | 5V/1A |
| Loudspeaker Size | 2.5 inch |
| Battery Capacity | 3x 1800mAh (3.7V) |
| Product Dimensions (L x W x H) | 162.6 x 33.5 x 88.9 mm |
| Product Weight | Approx. 350g |
| Bluetooth Version | 5.0 |
| Maximum Wireless Range | 10m-20m |
| Frequency Range (Audio) | 100Hz-20KHz |
| Frequency Range (Radio FM) | 70MHz-108MHz |
| Output Power (PMPO) | 100 W |
| Input Power | <25 W |
| Channels | 2 (2.0) |
| Audio Crossover | Full-Range |
| Display Screen | Yes (4.3-inch or 7.0-inch HD) |
| Support Memory Card | Yes (TF card, dual slots) |
| Communication | AUX, USB |
| Features | Phone Function, Play Video, Built-in Microphone, Recording |
| Origin | Mainland China |
| Certification | CE |
10. User Tips
- For extended listening sessions, ensure the detachable batteries are fully charged. They provide approximately 8-10 hours of continuous playback.
- Take advantage of the dual TF card slots to expand your media library significantly.
- The device's lightweight and hanging rope design make it perfect for portable use during outdoor activities.
- The product includes batteries, so you can start using it right out of the box after a quick charge.
11. Warranty and Support
For any questions, technical assistance, or warranty claims, please contact the seller or refer to the product packaging for specific support information. Keep your purchase receipt as proof of purchase.