Product Overview
The PRUNUS J-328 is a compact and lightweight portable FM radio designed for ease of use and portability. It features FM radio reception, MP3 playback from a TF card, and a voice recorder function. Its small size and rechargeable battery make it ideal for on-the-go listening.
Front view of the PRUNUS J-328 Mini Portable Pocket FM Radio in red, showcasing its compact design, digital display, and control buttons.
An image illustrating the compact size of the PRUNUS J-328 radio, showing its dimensions (93.5mm height, 48mm width, 19mm thickness) and comparing it to a standard credit card for scale. The radio weighs 72g (0.15lb).
Key Features
- Super Portable: This portable pocket radio (size 93.5*48*19mm; weight only 72g) is quite easy to carry with your holding lanyard. Pack lightly with rosy voice always accompanied while staying at home, walking, camping, climbing, etc. Note: KEEP AWAY FROM WATER
- Multifunctional: With this FM 87.5-108MHz / AUX input & TF Card Music Play / Recording radio, you can unwind yourself by turning into your favorite station or the music you like. FM radios with best reception, any radio station will be there for you. And a function of Auto Screen Off when playing prolongs the use time excellently. Besides, the LOCK BUTTON will perfectly avoid accidental operation while you are on a crowed subway, bus, etc.
- Perfect Sound Quality: This digital pocket radio supporting standard 3.5mm headphone jack will bring you back to your younger years. With built-in 3W high-quality magnetic speaker featured as reliable deep bass, smooth treble and clear sound, you could luxuriate in your peaceful morning along with soothing music and various news.
- Hidden Antenna & Easy Operation & Charging: 1) Equipped with a portable hidden antenna double as a durable lanyard for you to carry. 2) With simple one key operation, all available radio stations around can be scanned and saved automatically. (Note: stations can’t be changed after searching!) 3) 500mAh rechargeable battery radio with cable, you can use DC5V/500mA-2A USB adapter, computer, power bank to charge it. Searching and charging couldn’t be easier.
- Mini Radio with Recorder: Insert a TF card loaded with MP3 files, then record your favorite radio stations, slowly taste the events told or re-listen the music, saving your precious time. Moreover, you can also record your own voice to make a reminder or memo your opinion while listening to the news.
Setup Guide
Initial Charge
Before first use, fully charge the PRUNUS J-328 radio. Connect the provided USB cable to the DC5V/AUX port on the radio and to a USB power source (e.g., computer, USB adapter, power bank). The LED indicator will show charging status. A full charge typically takes a few hours.
The top view of the PRUNUS J-328 radio showing the DC5V/AUX port and the LED indicator, connected to a USB charging cable. Ensure the radio is fully charged before initial use for optimal battery life.
Inserting a TF Card (Optional)
To play MP3 files or record audio, insert a TF (microSD) card into the designated slot. Ensure the card is formatted to FAT32 for best compatibility. The radio supports up to 32GB TF cards, though some 64GB cards may work if formatted correctly.
The PRUNUS J-328 radio displaying the TF card slot, indicating its readiness for recording FM stations or voice notes. A TF card is required for these functions.
Operating Instructions
Power On/Off
Slide the ON/OFF switch located on the top of the radio to the 'ON' position to power on the device. Slide it to 'OFF' to power off.
FM Radio Operation
- Automatic Station Scan: With the radio powered on, press the 'SCAN' button. The radio will automatically scan and save all available FM stations. Note that stations cannot be manually changed after scanning; a new scan is required to update the list.
- Manual Tuning: Use the number pad (0-9) to directly input the frequency of the desired FM station. For example, to tune to 92.3 FM, press 9-2-3.
- Changing Stations: Use the 'Previous' (◀◀) and 'Next' (▶▶) buttons to navigate through saved stations or frequencies.
An official product video demonstrating the basic functions and features of the PRUNUS J-328 radio, including FM tuning and general operation.
MP3 Playback (TF Card)
- Insert TF Card: Ensure a TF card with MP3 files is inserted into the radio.
- Switch Mode: Press the 'MODE' button to switch to TF card playback mode. The display will show 'TF' and the track number.
- Playback Control: Use the 'Play/Pause' (▶▶ / ▌▌) button to start or pause playback. Use the 'Previous' (◀◀) and 'Next' (▶▶) buttons to skip tracks.
Recording Function
- Prepare for Recording: Ensure a TF card is inserted.
- Start Recording: While in FM radio mode or AUX input mode, press the 'REC' button to begin recording. The display will show 'REC' and a timer.
- Stop Recording: Press the 'REC' button again to stop recording. The recorded file will be saved on the TF card.
- Access Recordings: Switch to TF card mode and navigate to the recorded files.
The PRUNUS J-328 radio's display showing 'REC' indicating that the recording function is active. This feature allows users to record FM radio broadcasts or external audio via AUX input onto a TF card.
Volume Control
Adjust the volume using the rotary dial located on the side of the radio. Rotate clockwise to increase volume and counter-clockwise to decrease.
Lock Key Function
To prevent accidental button presses, press and hold the 'LOCK' button (0🔒) on the keypad. The display will show a lock icon. Press and hold again to unlock.
The PRUNUS J-328 radio held in hand, illustrating its compact size and the integrated hidden antenna within the lanyard for improved portability and durability.
Maintenance
Cleaning
Wipe the radio with a soft, dry cloth. Do not use liquid cleaners or abrasive materials, as they may damage the surface 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. Ensure the battery is partially charged (around 50%) before storage to prolong its lifespan.
Battery Care
The PRUNUS J-328 uses a built-in rechargeable Lithium Polymer battery. Avoid fully discharging the battery frequently. Recharge the battery regularly, even if the radio is not in constant use, to maintain battery health.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Radio does not power on. | Battery is depleted. | Charge the radio using the provided USB cable. |
| Poor FM reception. | Weak signal; antenna not extended/positioned correctly. | Ensure the lanyard (which acts as an antenna) is fully extended. Try repositioning the radio. Perform an automatic station scan again. |
| TF card not recognized. | Incorrect format; card not inserted properly; card capacity too large. | Ensure TF card is formatted to FAT32. Reinsert the card firmly. Try a different TF card (max 32GB recommended). |
| No sound from speaker. | Volume too low; headphones connected. | Increase the volume using the rotary dial. Disconnect headphones if present. |
Specifications
| Feature | Detail |
|---|---|
| Model Number | J-328 |
| Dimensions (L x W x H) | 3.68 x 0.75 x 1.89 inches (93.5 x 48 x 19 mm) |
| Weight | 2.5 ounces (72g) |
| FM Frequency Range | 87.5 - 108 MHz |
| Audio Format Support | MP3 |
| TF Card Support | Up to 32GB (FAT32 format) |
| Speaker Output | 3W |
| Battery Type | Rechargeable Lithium Polymer |
| Charging Input | DC 5V/500mA-2A (USB) |
| Connectivity | Auxiliary, USB |
| Included Components | USB Cord, Owner's Manual |
Warranty and Support
Warranty Information
PRUNUS products typically come with a standard manufacturer's warranty. Please refer to the warranty card included in your product packaging for specific terms and conditions, including warranty period and coverage details. Keep your purchase receipt as proof of purchase.
Customer Support
For technical assistance, troubleshooting, or warranty claims, please contact PRUNUS customer support. Contact information can usually be found on the product packaging, the official PRUNUS website, or through your point of purchase.
You can also visit the official PRUNUS store on Amazon for more information and support: PRUNUS Amazon Store
