Introduction
Thank you for choosing the JOC Digital Radio. This multi-wave radio features an integrated MP3 player, supporting playback from USB drives and TF cards, making it ideal for daily use. Designed for portability and convenience, it is powered by a long-lasting lithium-ion battery and includes an automatic station search function. This manual provides essential information for the safe and efficient operation of your device.
Safety Information
- Do not expose the device to water or excessive moisture.
- Avoid extreme temperatures, direct sunlight, or dusty environments.
- Do not attempt to disassemble or modify the radio. This may void the warranty and pose safety risks.
- Use only the provided charging cable and a compatible power adapter.
- Keep out of reach of children.
- Dispose of batteries according to local regulations.
Package Contents
Please check the package for the following items:
- JOC Digital Radio (Model 11428521)
- Charging Cable (Power Adapter may or may not be included, depending on retailer)
- Lithium-ion Battery (pre-installed or separate)
- User Manual (this document)
Product Overview
The JOC Digital Radio is designed for ease of use and portability. It features a digital display, an extendable antenna for improved reception, and multiple playback options.

Image: Rear view of the JOC Digital Radio. This image displays the rear of the JOC Digital Radio. It features a removable battery compartment cover on the left, a circular speaker grille with the 'JOC make reliable' logo on the right, and a black carrying strap attached to the top right corner. An extendable antenna is visible at the top.
Key features include:
- High-quality digital FM radio tuner.
- MP3 playback via USB drive and TF (MicroSD) card slots.
- Long-lasting rechargeable lithium-ion battery (up to 8+ hours).
- Lightweight and portable design with a carrying strap.
- Automatic station search function.
Setup
1. Battery Installation and Charging
- Install Battery: If the battery is not pre-installed, open the battery compartment cover on the back of the radio. Insert the lithium-ion battery, ensuring correct polarity (+/-). Close the cover securely.
- Initial Charge: Before first use, fully charge the radio. Connect the provided charging cable to the radio's charging port and the other end to a USB power source (e.g., computer USB port, USB wall adapter). The charging indicator light will typically illuminate during charging and turn off or change color when fully charged.
- Power On: Once charged, press and hold the Power button to turn on the radio.
Operating Instructions
1. Power On/Off
- To turn on, press and hold the Power button.
- To turn off, press and hold the Power button again.
2. Mode Selection
Press the Mode button (if available) to switch between FM Radio mode and MP3 Player mode (USB/TF card).
3. FM Radio Operation
- Extend Antenna: Fully extend the telescopic antenna for optimal FM reception.
- Automatic Scan: In FM mode, press and hold the Play/Pause button (or a dedicated scan button) to initiate an automatic scan. The radio will search for and save available FM stations.
- Manual Tuning/Station Selection: Use the Previous/Next track buttons to navigate through saved stations or manually tune to a frequency.
4. MP3 Playback (USB/TF Card)
- Insert Media: Insert a USB drive or TF (MicroSD) card containing MP3 audio files into the respective slot.
- Select Mode: Switch to MP3 Player mode using the Mode button. The radio should automatically detect and begin playing music from the inserted media.
- Playback Controls:
- Play/Pause: Press to play or pause the current track.
- Previous/Next: Press to skip to the previous or next track.
- Volume: Use the dedicated volume control (dial or buttons) to adjust the sound level.
Maintenance
- Cleaning: Wipe the radio with a soft, dry cloth. Do not use liquid cleaners or abrasive materials.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Recharge the battery regularly, even if the radio is not in use for extended periods.
- Storage: Store the radio in a cool, dry place away from direct sunlight and extreme temperatures.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Radio does not power on. | Battery is discharged or incorrectly installed. | Charge the battery. Ensure the battery is correctly installed with proper polarity. |
| Poor FM reception. | Antenna not extended, weak signal, or interference. | Fully extend the telescopic antenna. Try repositioning the radio. Perform an automatic scan again. |
| MP3 files not playing. | Incorrect mode, unsupported file format, or corrupted media. | Ensure the radio is in MP3 playback mode. Verify files are in MP3 format. Try a different USB drive or TF card. |
| No sound. | Volume is too low or muted. | Increase the volume using the volume control. |
Specifications
| Brand | JOC |
| Model Number | 11428521 |
| Color | Blue |
| Special Features | Lightweight, Portable |
| Connectivity Technology | USB, TF Card |
| Product Dimensions (LxWxH) | 44mm x 80mm x 148mm |
| Tuner Technology | FM |
| Power Source | Battery Powered (Lithium-ion) |
| Radio Bands Supported | FM |
| Included Components | Charging Cable |
| Frequency | Up to 108 MHz (FM range typically 87.5-108 MHz) |
| Compatible Devices | MP3 Player, USB Drive |
| Hardware Interface | USB |
Warranty and Support
This product is sold without an explicit warranty as per manufacturer specifications. For any operational issues or technical inquiries not covered in this manual, please refer to the retailer where the product was purchased for potential support options.
Always ensure you are using the product as intended and following all safety guidelines to prevent damage or malfunction.