1. Introduction
Thank you for purchasing the NVPONE L-628 Mini Portable FM Radio. This device is a versatile audio player featuring FM radio, TF card MP3 playback, Bluetooth connectivity, voice recording, and a built-in LED flashlight. Its compact design makes it ideal for outdoor activities, cycling, and running. Please read this manual carefully to ensure proper use and maintenance of your device.
2. Product Overview
Familiarize yourself with the components and controls of your L-628 radio.
Control Buttons and Ports:
- Power Switch (①): Long press for 3 seconds to turn the product on or off.
- Previous/Rewind (◀◀): Short press for previous MP3 (MP3 mode) or previous channel (FM mode). Long press to rewind (MP3 mode).
- Play/Pause/Mute (►▌▌): Short press to play or pause (MP3 mode). Short press to mute speaker (FM mode). Long press for over 3 seconds to automatically scan and memorize FM channels.
- Next/Fast-forward (▶▶): Short press for next MP3 (MP3 mode) or next channel (FM mode). Long press to fast-forward (MP3 mode).
- Repeat Mode (ONE/FOLD/ALL): First press for ONE (repeats current MP3). Next press for FOLD (repeats MP3s in current folder). Next press for ALL (repeats all MP3s).
- MODE: Switches between TF card, Bluetooth (BT), and FM radio modes.
- Folder Navigation (◀◀ / ▶▶ with 1 or 2): Long press button 1 or 2 for previous or next folder.
- Number Buttons (0-9): Used to select specific MP3 files (MP3 mode) or direct frequency input/channel selection (FM radio mode).
- REC (Record): Short press to record outside sound (TF card mode) or FM radio content (FM mode). Another short press stops recording and broadcasts. Long press to delete recorded content.
- LED: Hold press to turn the LED flashlight on.
- TF Card Slot: Insert TF card with MP3 files for playback.
- Volume Knob: Rotate to adjust volume (up for louder, down for quieter).
- LED Flashlight/Charging Indicator: Integrated LED for illumination and charging status.
- DC5V IN: DC5V charging jack.
- Earphone Output Jack: Plug in earphones to transfer audio to earphones and mute the speaker.
- FM Radio Telescopic Antenna: Extend for better FM signal reception.
3. Setup
3.1. Charging the Battery
When the display screen flashes or the radio operates intermittently, it indicates low battery. Please charge the device as follows:
- Connect the large end of the USB charging cable to a standard mobile phone charger or adapter (DC5V 300mA-1A).
- Connect the small end of the USB charging cable to the DC5V IN charging jack on the radio.
- The LED charging indicator will light up red during charging. If it does not light, check the cable and charger for issues.
- Charging typically takes 2-3 hours. The indicator will turn green when fully charged.
Important: If not using the product for an extended period, charge it once a month to prevent battery depletion.
3.2. Inserting a TF Card
To play MP3 files from a TF card:
- Locate the TF card slot on the device.
- Insert the TF card with MP3 files in the correct direction. Incorrect insertion may damage the card or the slot.
- The device will automatically switch to MP3 mode or you can manually select it using the MODE button.
4. Operating Instructions
4.1. FM Radio Operation
The radio comes with pre-memorized channels. If you are in a new location, you will need to scan for local FM channels:
- Completely extend the telescopic antenna for optimal reception.
- Turn on the radio and press the MODE button to switch to FM radio mode.
- Long press the Play/Pause/Mute (►▌▌) button for over 3 seconds. The display will show numbers rapidly jumping from 76 to 108, indicating automatic channel scanning.
- Once scanning is complete, the radio will automatically play the first memorized channel.
- Use the Previous (◀◀) or Next (▶▶) buttons to navigate between channels.
- Alternatively, use the number buttons (0-9) to directly select a channel:
- To select a specific channel number (e.g., 15th channel), press 1+5.
- To tune to a specific frequency (e.g., 87.8 MHz), press 8+7+8.
4.2. MP3 Playback (TF Card)
After inserting a TF card with MP3 files:
- Ensure the device is in TF card mode (use the MODE button if necessary).
- Press the Play/Pause (►▌▌) button to start or pause playback.
- Use the Previous (◀◀) or Next (▶▶) buttons for track navigation. Long press to rewind or fast-forward.
- Press the Repeat Mode button to cycle through repeat options: ONE (repeat current track), FOLD (repeat current folder), ALL (repeat all tracks).
- Use the number buttons (0-9) to select a specific MP3 file (e.g., press 1+3+5 for the 135th MP3).
- Long press button 1 or 2 to navigate between folders on the TF card.
4.3. Bluetooth (BT) Connection
To connect your mobile phone via Bluetooth:
- Turn on the radio and press the MODE button to switch to BT mode. The BT letters on the display will flash.
- Enable Bluetooth on your mobile phone and search for available devices.
- Select the device name (e.g., L-628) to pair.
- Upon successful pairing, a hint tone will sound, and the BT letters on the display will stop flashing. You can now play music from your phone through the radio.
4.4. Voice Recording
The L-628 supports voice recording:
- In TF Card Mode: Short press the REC button to start recording external audio. Press REC again to stop recording and play back the recorded content.
- In FM Radio Mode: Short press the REC button to record the current FM radio content.
- Deleting Recordings: Long press the REC button to delete recorded content.
4.5. LED Flashlight
To use the built-in flashlight:
- Hold press the LED button to turn the flashlight on. Release to turn off.
5. Maintenance
- Keep the device clean by wiping it with a soft, dry cloth. Avoid using harsh chemicals or abrasive cleaners.
- Protect the device from extreme temperatures, direct sunlight, and moisture.
- Do not drop or subject the device to strong impacts.
- If the device will not be used for a long period, charge it once a month to maintain battery health.
6. Troubleshooting
| Problem | Solution |
|---|---|
| Cannot charge the product. | Check if the charging cable or charger is faulty. Ensure the LED charging indicator lights red. |
| Cannot turn on the product. | The battery may be depleted; charge it. The battery may have reached the end of its lifespan. |
| No sound during playback. | Check if the volume knob is at the lowest setting. Ensure the speaker is not muted (press Play/Pause button again or restart the device). |
| Cannot broadcast FM radio channels. | Extend the antenna fully. Perform an auto-scan for channels (long press Play/Pause button in FM mode). |
| TF card files fail to read. | Ensure files are in MP3 format; other formats are not supported. Try a different TF card to rule out card issues. |
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | L-628 |
| Brand Name | NVPONE |
| Type | FM Radio |
| Style | Portable |
| Functions | Built-In Speaker, Flashlight, TF Card Slot, Bluetooth, Voice Recorder |
| Radio Frequency | FM: 76-108MHz |
| Output | 5W (Max) |
| Power Input | DC5V 500mA |
| Built-in Battery | 700mAh |
| Product Dimension | 59.2 x 18.5 x 106 mm |
| WIFI | Yes |
| Bluetooth | Yes |
| Screen | Yes |
| Battery Included | No (Refers to removable battery, but has built-in) |
8. User Tips
- For best FM reception, always fully extend the telescopic antenna, especially in areas with weak signals.
- When using the TF card, ensure your MP3 files are properly formatted and not corrupted to avoid playback issues.
- To conserve battery life, turn off the device when not in use and avoid leaving the flashlight on unnecessarily.
- The direct frequency input using number buttons can be very convenient for quickly tuning to known stations.
9. Package Contents
- NVPONE L-628 Mini Portable FM Radio: 1 PC
- USB Charging Cable: 1 PC
- User Manual: 1 PC
10. Safety Precautions
- Always charge this product in a safe environment, away from unstable voltages or dangerous goods.
- Use only a suitable and standard DC5V/300mA-1A charger. Using an unsuitable charger may damage the product or prevent proper charging.
- Do not leave the product charging unattended.
- Avoid using this product in environments exceeding 45 degrees Celsius.
- Do not dispose of this product in fire, as it may cause an explosion.
11. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the seller's specific terms and conditions or contact their customer service directly. Keep your purchase receipt as proof of purchase.