Product Overview
The PRUNUS J-329 is a compact and versatile mini portable radio designed for convenience and clear audio reception. It features both AM and FM bands, an integrated MP3 player via TF card, and a sleep timer function, making it ideal for various activities such as walking, traveling, or relaxing at home. Its small size and lightweight design ensure easy portability.
Image: Front view of the PRUNUS J-329 radio, displaying "FM 90.5" on its screen, highlighting its compact size and clear display.
Setup and First Use
Charging the Battery
The PRUNUS J-329 radio is equipped with a rechargeable battery. Before first use, or when the battery indicator shows low power, charge the device using the provided USB-C cable.
- Locate the USB-C charging port on the top of the radio.
- Insert the USB-C cable into the radio's port and the other end into a compatible USB power adapter (not included) or a computer's USB port.
- The charging indicator will illuminate. Once fully charged, the indicator may change color or turn off, depending on the model.
Image: Detailed view of the radio's top and side, highlighting the USB-C charging port, volume knob, and tuning knob for easy identification.
Powering On/Off
Press and hold the red power button (⏻) located on the front panel to turn the radio on or off.
Operating Instructions
Radio Operation (AM/FM)
The J-329 supports both AM and FM radio bands with adjustable tuning steps for global compatibility.
- Switching Bands: Press the FM or AM 9K/10K buttons to select the desired radio band.
- AM Tuning Steps: For AM reception, select AM 9K for regions like Europe, Asia, Australia, and Africa. Select AM 10K for the USA, Canada, and some South American countries.
- Tuning: Extend the 14-inch telescopic antenna for optimal FM reception. For AM, the internal ferrite bar antenna is used. Use the tuning knob on the side of the radio to precisely adjust the frequency. The large screen will display the current frequency.
- Volume Control: Adjust the volume using the dedicated volume knob on the side.
Image: The PRUNUS J-329 radio in use, illustrating its global AM/FM tuning capabilities with specific frequency ranges for different regions.
MP3 Player Operation
The radio supports MP3 and WAV audio playback from a TF (microSD) card.
- Insert TF Card: Gently insert a TF card (up to 32GB, not included) with your audio files into the TF card slot on the top of the radio.
- Switch to MP3 Mode: Press the MP3 button to switch to MP3 playback mode. The screen will display "TF" and the track number/time.
- Playback Controls: Use the Play/Pause, Previous Track, and Next Track buttons to control playback.
- Repeat Mode: Press the repeat button (circular arrow icon) to cycle through repeat modes: ONE (repeat single track), FOLD (repeat current folder), ALL (repeat all tracks).
Note: The device does not support direct file management or folder navigation on the radio itself. Files are played in the order they were copied to the card.
Image: The radio with its TF card slot visible, emphasizing its capability to play music from a memory card.
Sleep Timer Function
The sleep timer allows the radio to automatically turn off after a set period.
- Press the sleep timer button (clock icon) repeatedly to cycle through available durations: 15, 30, 60, 90, 120, 240 minutes, or OFF.
- The selected time will be displayed on the screen. The radio will automatically power off once the timer expires.
Image: A visual representation of the sleep timer feature, showing the radio on a nightstand next to a sleeping person, with a graphic indicating timer options.
Using Headphones
For private listening, plug any standard 3.5mm headphones (not included) into the earphone jack on the top of the radio. The internal speaker will automatically mute.
Image: A woman using the radio with headphones, illustrating the private listening feature.
Official Product Video
Video: An official demonstration of the PRUNUS J-329 radio, showcasing its features including power on, telescopic antenna, AM/FM tuning, TF card playback, sleep timer, and USB-C charging. This video provides a comprehensive visual guide to the radio's functionality.
Maintenance
To ensure the longevity and optimal performance of your PRUNUS J-329 radio, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the exterior of the radio. Do not use liquid cleaners or abrasive materials, as they may damage the finish or internal components.
- Storage: When not in use for extended periods, store the radio in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To maintain battery health, avoid fully discharging the battery frequently. If storing for a long time, charge the battery to about 50% every few months.
- Avoid Moisture: Keep the radio away from water and high humidity. This device is not waterproof.
Troubleshooting
If you encounter issues with your PRUNUS J-329 radio, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power/Radio does not turn on. | Battery is depleted. | Charge the radio using the USB-C cable. Ensure the charging indicator is on. |
| Poor radio reception (static/weak signal). | Antenna not extended (FM). Weak signal area. Incorrect AM tuning step. | Fully extend the telescopic antenna for FM. Try moving to a different location. Ensure the correct AM 9K/10K step is selected for your region. |
| MP3 player not working. | TF card not inserted correctly. TF card corrupted or empty. Unsupported file format. | Re-insert the TF card firmly. Ensure the TF card contains MP3 or WAV files. Try a different TF card. |
| Tuning knob is too sensitive. | Characteristic of the device's fine-tuning mechanism. | Adjust the tuning knob slowly and with small movements to pinpoint the desired frequency. |
| No sound from headphones. | Headphones not fully plugged in. Faulty headphones. | Ensure the 3.5mm headphone jack is fully inserted. Test with another pair of headphones. |
Specifications
| Feature | Detail |
|---|---|
| Model Number | J-329 |
| Product Dimensions | 0.9 x 0.32 x 4.35 inches |
| Item Weight | 5.3 ounces |
| Tuner Technology | AM (9K/10K) / FM (87-108 MHz) |
| Power Source | Rechargeable Battery Operated (USB-C) |
| Connectivity Technology | TF card (for MP3/WAV playback) |
| Audio Output | Built-in 3W speaker, 3.5mm headphone jack |
| Special Features | Lightweight, Portable/Pocket, Sleep Timer (15-240 mins) |
Warranty and Support
This product comes with an Owner's Manual. For specific warranty information and customer support, please refer to the documentation included with your purchase or visit the official PRUNUS website. Keep your purchase receipt for warranty claims.