Introduction
The SANSUI F53 is a versatile portable multimedia speaker designed for a wide range of audio and video entertainment. Featuring a 4.3-inch LED display, Bluetooth 5.3 connectivity, FM radio, and support for USB and TF card playback, it offers multiple ways to enjoy your media. Its compact design and long battery life make it ideal for both indoor and outdoor use.

Product Features
- Bluetooth 5.3: Advanced wireless connectivity for stable and low-latency audio streaming.
- 4.3-inch LED Display: High-definition screen supporting 720P and up to 1080P video playback.
- FM Radio: Receives 87.5-108MHz with automatic station search and digital frequency input.
- Multiple Playback Options: Supports USB drive, TF card, and earphone playback.
- Digital Song Selection: Convenient function for selecting tracks.
- High-Quality Sound: Equipped with a 1.75-inch internal magnetic speaker and passive bass enhancement for rich, deep sound.
- Long Battery Life: Built-in 3600mAh (1800mAh x 2 cells) lithium battery for extended usage.
- Portable Design: Features a hanging rope for easy carrying and a compact size.
- Type-C Charging: Modern and convenient charging interface.
- Built-in Microphone: For hands-free communication.
- Waterproof: Yes.
- Support APP: Yes.

Specifications
| Attribute | Value |
|---|---|
| Brand Name | SANSUI (MouZYuan) |
| Model | F53 |
| Speaker Configuration | 1.75-inch internal magnetic speaker |
| Rated Power | 8W |
| PMPO | 25 W |
| Frequency Response | 100Hz-18KHz |
| Bluetooth Version | 5.3 (Apt-X HD Codecs) |
| Maximum Wireless Range | 10m-20m |
| Battery Type | Built-in Lithium Battery |
| Battery Capacity | 3.7V (1800mAh x 2PCS) |
| Input Power Supply | DC 5V/2A |
| Input/Output | USB, AUX |
| Body Size (L*W*H) | 140mm * 42mm * 85mm |
| Net Weight | 0.45 kg (450g) |
| Display Screen | 4.3-inch LED Display |
| Touch Screen | No |
| Sound Mode | Hi-Res, 3D Surround, Immersive, Stereo, Smart, Live, Extra Bass, Standard |
| Audio Crossover | Full-Range |
| Number of Loudspeaker Enclosure | 1 |
| Channels | 3 (2.1) |
| Waterproof | Yes |
| Built-in Microphone | Yes |
| Support APP | Yes |
| Support Memory Card | Yes |
| Control Type | Volume control |
| Material | Plastic (Cabinet, Sabwoofer) / Metal (Woofer/Widerange, Mid-range, Tweeter) |
| Tweeter Type | PIEZO |
| Acoustic Enclosure | Transmission line |
| Sensitivity | 75dB |
| Impedance | 2-4 Ohm |
| Active Noise-Cancellation | PASSIVE |
| Wi-Fi Music | Apple Music |
| Voice Control | No |
| Intelligent Personal Assistant | NONE |
| Playback Function | Radio, MP3 |
| Remote Control | No |
| Certification | CE |

Setup
1. Unpacking and Initial Inspection
- Carefully remove the speaker and all accessories from the packaging.
- Verify that all items are present: 1 x SANSUI F53 Radio, 1 x Charging cable, 1 x Instruction manual.
- Inspect the device for any signs of damage.
2. Charging the Device
- Locate the Type-C charging port on the device.
- Connect the provided charging cable to the speaker and a compatible USB power adapter (DC 5V/2A recommended).
- The charging indicator will illuminate. Allow the device to fully charge before first use (approximately 8 hours for full charge).
- A full charge provides over 8 hours of playback.

3. Powering On/Off
- Press and hold the Power button (usually marked with a power symbol) for a few seconds to turn the device on or off.
- The LED display will light up upon powering on.
Operating Instructions
1. Basic Navigation
- Use the physical buttons on the device to navigate through menus, adjust volume, and control playback.
- The 4.3-inch LED display provides a visual interface for selecting functions like Music, Video, Bluetooth, Radio, File Management, and Settings.
2. Bluetooth Connection
- Turn on the SANSUI F53 speaker.
- Navigate to the "Bluetooth" option on the display or press the dedicated Bluetooth button.
- On your mobile phone or tablet, enable Bluetooth and search for available devices.
- Select "SANSUI F53" (or similar name) from the list to pair.
- Once connected, you can stream audio wirelessly from your device to the speaker.

3. FM Radio Operation
- Select the "Radio" function from the main menu.
- The speaker can receive FM frequencies between 87.5-108MHz.
- Use the navigation buttons to automatically search for stations or manually input a specific frequency.
- The display will show the current frequency and station information.

4. Media Playback (USB/TF Card)
- Insert a USB drive into the USB port or a TF card into the TF card slot.
- The device will automatically detect the storage and prompt you to select "Music" or "Video" playback.
- Use the digital song selection function (buttons 0-9) to quickly jump to specific tracks.
- The 4.3-inch LED display supports full 720P high-definition video playback and can handle up to 1080P video files.
- Lyrics synchronization display is supported for music files.


5. Earphone Playback
- Plug standard 3.5mm earphones into the earphone jack for private listening.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the speaker. Do not use harsh chemicals or abrasive cleaners.
- Storage: Store the speaker in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge the device regularly, even if not in use for extended periods.
- Water Resistance: While the device is waterproof, avoid submerging it in water or exposing it to strong jets of water. Ensure all ports are dry before charging.
Troubleshooting
- Device won't turn on: Ensure the battery is charged. Connect to a power source using the Type-C cable and try again.
- No sound: Check the volume level on both the speaker and the connected device (if using Bluetooth). Ensure the correct playback mode (Bluetooth, USB, TF card, FM) is selected.
- Bluetooth pairing issues: Make sure the speaker is in Bluetooth pairing mode. Turn off and on Bluetooth on both devices. Ensure no other devices are connected to the speaker.
- Poor FM radio reception: Try repositioning the speaker to find a stronger signal. If possible, use an external antenna (not included) for improved reception.
- Display language is not English: The manual indicates that the device's menu might be primarily in Chinese with limited English support. Look for a "Settings" or "设置" icon on the display and navigate to language options. If an English option is not available, consider using a translation app to understand the menu icons and basic functions.
- Video playback issues: Ensure video files are in a compatible format and resolution (up to 1080P supported). Check if the file is corrupted.
User Tips
- Sound Quality: Users praise the balanced sound, high volume, and deep bass. Experiment with different sound modes (Hi-Res, 3D Surround, Extra Bass, etc.) to find your preferred audio experience.
- Versatility: The SANSUI F53 is highly versatile. Use it for music, radio, watching videos, or even as a portable speaker for phone calls thanks to its built-in microphone.
- Battery Life: The 3600mAh battery provides excellent endurance, often lasting over 5 hours during continuous operation. Keep it charged for uninterrupted entertainment.
- Language Barrier: Some users have noted that the device's menu and instructions might be predominantly in Chinese. If you encounter this, try to locate a "Settings" or "Language" option (often represented by a gear icon or text like "设置") to switch to English if available. Otherwise, a visual translation app on your smartphone can help interpret the on-screen options.
- FM Reception: If FM radio reception is poor, try moving the speaker to an open area or near a window. While an external antenna is not included, a simple wire connected to the AUX port might sometimes improve signal strength.
Warranty and Support
For warranty information and technical support, please refer to the contact details provided by your retailer or the manufacturer's official website. Keep your purchase receipt as proof of purchase for any warranty claims.