PRUNUS 750 AM FM Radio Portable with Bluetooth Speaker User Manual

1. Introduction

This manual provides instructions for the operation and maintenance of your PRUNUS 750 portable radio. This device features AM/FM/SW radio reception, Bluetooth connectivity, USB and TF card playback, and multiple charging options including solar and USB-C.

2. Package Contents

Verify that all items are present in the package:

PRUNUS 750 Radio
USB-C Charging Cord
Owner's Manual
Quick Start Guide

3. Product Overview

The PRUNUS 750 radio is designed for versatile audio playback and portability. It includes a telescopic antenna for radio reception, dual speakers for audio output, and various control buttons and ports.

PRUNUS 750 Portable Radio with colorful speaker lights — Figure 1: Front view of the PRUNUS 750 radio, showing the main controls, dual speakers with colorful lights, and the solar panel on top.

4. Powering the Device

The PRUNUS 750 radio offers two methods for power supply:

USB-C Charging: Connect the provided USB-C cable to the radio's charging port and a compatible USB power adapter (not included). The built-in 1800mAh rechargeable battery will charge.
Solar Charging: Place the radio in direct sunlight. The integrated solar panel (5.7 x 2.7 inches) will convert solar energy to charge the internal battery.

Diagram showing solar panel charging and USB-C charging methods for the radio — Figure 2: Illustration of the two power options: solar charging outdoors and USB-C charging indoors.

5. Operating Instructions

5.1. Radio Mode

Extend the telescopic antenna for optimal reception.
Use the band switch to select FM (87-108 MHz), AM (530-1710 KHz), or SW (5.9-18.0 MHz).
Rotate the tuning knob to scan for available stations. The frequency display will indicate the current station.

Image showing the radio with its antenna extended, illustrating strong reception — Figure 3: The radio with its telescopic antenna extended, demonstrating its capability for strong signal reception across FM, AM, and Shortwave bands.

5.2. Music Playback

The radio supports three methods for playing personal music files:

Bluetooth 5.3: Activate Bluetooth on your mobile device and select "PRUNUS 750" from the list of available devices to pair.
USB Drive: Insert a USB flash drive containing MP3, WAV, or WMA audio files into the USB port. The radio will automatically begin playback.
TF Card: Insert a TF (MicroSD) card containing MP3, WAV, or WMA audio files into the TF card slot. The radio will automatically begin playback.

People enjoying music from the radio, illustrating Bluetooth, USB, and TF card playback options — Figure 4: The radio in an outdoor setting, highlighting its versatility in playing music via Bluetooth, USB drive, or TF card.

5.3. Audio Features

Dual 5W Speakers: The unit is equipped with two 5-watt speakers for stereo sound output.
TWS Pairing: For an enhanced stereo experience, two PRUNUS 750 units (sold separately) can be paired wirelessly using True Wireless Stereo (TWS) technology. Refer to the Quick Start Guide for TWS pairing instructions.
Colorful Light Effects: The speakers feature 10 distinct light effects. These lights operate automatically during Bluetooth, USB, or TF card playback. They are automatically deactivated in radio mode.

Exploded view of the radio speakers, emphasizing stereo quality sound — Figure 5: An internal view of the radio's dual 5-watt speakers, illustrating the components that produce stereo sound.

5.4. Portability

The radio is designed for portability, featuring a compact size and a convenient carrying handle.

Image showing a person carrying the radio by its handle, with dimensions indicated — Figure 6: The radio being carried by its handle, with an overlay showing its dimensions (8.7 inches length, 3.5 inches width, 4.7 inches height).

6. Specifications

Feature	Detail
Model Number	J-750
Product Dimensions	8.5 x 3.9 x 5 inches
Item Weight	1.9 pounds
Battery	1 Lithium Polymer battery (1800mAh built-in)
Power Source	Solar Powered, Rechargeable Battery (USB-C)
Radio Bands Supported	FM (87-108 MHz), AM (530-1710 KHz), SW (5.9-18.0 MHz)
Connectivity Technology	Bluetooth 5.3, USB, TF Card
Audio Formats Supported	MP3, WAV, WMA
Speakers	Dual 5W speakers

7. Maintenance

Cleaning: Use a soft, dry cloth to clean the exterior of the radio. Avoid using abrasive cleaners or solvents.
Storage: Store the radio in a cool, dry place away from direct sunlight and extreme temperatures when not in use for extended periods.
Battery Care: To prolong battery life, fully charge the radio before first use and periodically recharge it if stored for long durations.

8. Troubleshooting

Problem	Possible Solution
No power	Ensure the battery is charged. Connect to USB-C power or place in direct sunlight. Check the power switch position.
Poor radio reception	Fully extend the telescopic antenna. Adjust the radio's position. Try tuning to a different frequency.
Bluetooth not connecting	Ensure the radio is in Bluetooth mode. Check that Bluetooth is enabled on your device and within range. Forget and re-pair the device.
USB/TF card playback issues	Ensure audio files are in supported formats (MP3, WAV, WMA). Check that the USB drive or TF card is inserted correctly and not corrupted.
Volume knob difficult to adjust	Operate the volume knob gently. If persistent, contact customer support.

9. Safety Information

Do not expose the radio to water, moisture, or extreme temperatures.
Avoid dropping or subjecting the device to strong impacts.
Do not attempt to disassemble or repair the radio yourself. Refer all servicing to qualified personnel.
Keep out of reach of children.
Dispose of batteries according to local regulations.

10. Customer Support

For any questions, technical assistance, or warranty inquiries, please contact PRUNUS customer support. Refer to the contact information provided in your Quick Start Guide or visit the official PRUNUS website.

PRUNUS J-750