1. Introduction
Step into a world of nostalgia and timeless style with the PRUNUS J-999 Retro Bluetooth Speaker. This portable speaker combines a vintage aesthetic with modern audio technology, offering multiple playback options and clear sound in a compact design. Enjoy your favorite music anywhere with ease.

The PRUNUS J-999 speaker, showcasing its compact size and retro design on a table.
2. Product Features
- Retro Design: Vintage-inspired appearance with a delicate finish, adding a touch of classic charm to any setting.
- Portable: Compact size (2.2 x 3.9 x 2.7 inches) and lightweight (0.44 lbs) with an elegant PU handle for easy carrying.
- Clear and Loud Sound: Features a powerful 3W speaker and a bass diaphragm for exceptional audio quality and depth.
- Multi-functional Playback: Supports Bluetooth 5.0, TF card, USB drive, AUX input, and FM radio (87-108MHz).
- Hands-free Calling: Built-in microphone allows for answering calls with a single press of a button when connected via Bluetooth.
- Long Battery Life: Provides up to 7 hours of uninterrupted playback at 50% volume on a single charge.

An overview of the PRUNUS J-999's key features and available colors.
3. Package Contents
- PRUNUS J-999 Retro Bluetooth Speaker
- Micro USB Charging Cable
- AUX Audio Cable
- User Manual
4. Parts of the Speaker
Front Panel

- Volume Knob: Rotate to adjust volume.
- Power/Mode Button: Long press to power on/off, double press to switch modes.
- Previous Track Button: Short press for previous track/station.
- Play/Pause/Answer Call Button: Short press to play/pause, answer/end calls.
- Next Track Button: Short press for next track/station.
- Speaker Grille: Audio output.
Rear Panel

- DC 5V Port: Micro USB charging input.
- TF Card Slot: Insert TF (Micro SD) card for music playback.
- USB Port: Insert USB drive for music playback.
- AUX Input: Connect external audio devices via AUX cable.
- MIC: For hands-free calling.
Other Components
- PU Handle: For easy portability.
- Anti-slip Feet: Provides stability on surfaces.
5. Setup
5.1 Charging the Speaker
- Connect the provided Micro USB charging cable to the DC 5V port on the rear panel of the speaker.
- Connect the other end of the USB cable to a compatible USB power adapter (not included) or a computer's USB port.
- The charging indicator light will illuminate. Once fully charged, the light may change color or turn off (refer to specific model behavior).
5.2 Power On/Off
- To Power On: Long press the Power/Mode Button on the front panel until you hear an audible prompt or see the indicator light.
- To Power Off: Long press the Power/Mode Button again until the speaker powers down.
5.3 Bluetooth Pairing
- Ensure the speaker is powered on and in Bluetooth mode (indicated by a blue flashing light and an audible prompt). If not, double press the Power/Mode Button to switch to Bluetooth mode.
- On your mobile device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "PRUNUS J-999" from the list of devices.
- Once successfully paired, you will hear a confirmation sound, and the blue indicator light will stop flashing and remain solid.

The PRUNUS J-999 speaker seamlessly connected to a smartphone via Bluetooth.
6. Operating Instructions
6.1 Switching Playback Modes
- Double press the Power/Mode Button to cycle through available modes: Bluetooth, AUX, FM Radio, TF Card, and USB Drive.
This video demonstrates how to switch between different playback modes on the PRUNUS J-999 speaker, including AUX, Bluetooth, and FM radio.
6.2 Bluetooth Mode
- Play/Pause: Short press the Play/Pause Button.
- Next Track: Short press the Next Track Button.
- Previous Track: Short press the Previous Track Button.
6.3 FM Radio Mode
- Ensure the AUX cable is connected to the AUX port; it acts as the antenna for better signal reception.
- Switch the speaker to FM Radio mode.
- Auto-Scan Stations: Single press the Power/Mode Button to start automatic station scanning. Wait 2-3 minutes for the scan to complete.
- Switch Stations: Short press the Previous Track Button or Next Track Button to navigate through saved stations.
This video demonstrates how to use the FM radio function, including connecting the AUX cable as an antenna and scanning for stations.
6.4 TF Card / USB Drive Mode
- Insert a TF (Micro SD) card or USB drive into the respective slot on the rear panel. The speaker will automatically switch to the corresponding mode and begin playback.
- Use the Play/Pause, Previous Track, and Next Track Buttons to control playback.

The rear panel of the speaker, illustrating the various input options including TF card, USB, and AUX.
6.5 AUX Input Mode
- Connect one end of the provided AUX cable to the AUX input port on the speaker and the other end to the audio output of your external device.
- Switch the speaker to AUX mode. Audio will play directly from your connected device.
6.6 Hands-free Calling
- When a call comes in while connected via Bluetooth, short press the Play/Pause Button to answer the call.
- Short press the Play/Pause Button again to end the call.

An internal view of the speaker, illustrating the components responsible for its clear and powerful sound.
7. Maintenance
- Keep the speaker dry and away from moisture.
- Clean the speaker with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Avoid exposing the speaker to extreme temperatures (hot or cold).
- Charge the speaker regularly, even if not in frequent use, to maintain battery health.
- Do not attempt to disassemble or repair the speaker yourself. Contact customer support for assistance.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not power on. | Low battery. | Charge the speaker fully. |
| No sound. | Volume too low; incorrect mode; device not connected. | Increase volume; switch to correct mode (Bluetooth, AUX, TF, USB); ensure device is connected. |
| Bluetooth not connecting. | Speaker not in pairing mode; device Bluetooth off; speaker connected to another device. | Ensure speaker is in Bluetooth pairing mode (flashing blue light); turn on Bluetooth on your device; disconnect from other devices. |
| Poor FM radio reception. | AUX cable not connected or not straight. | Connect the AUX cable and keep it straight to act as an antenna. |
| USB/TF card not playing. | Card/drive not inserted correctly; unsupported file format. | Reinsert card/drive; ensure audio files are in a supported format (e.g., MP3). |
9. Specifications
| Feature | Detail |
|---|---|
| Model Name | J-999 |
| Product Dimensions | 3.9"D x 2.2"W x 2.7"H |
| Item Weight | 0.44 lbs (7.4 ounces) |
| Speaker Output Power | 3W |
| Battery | 3.7V 400mAh |
| Playback Time | Up to 7 hours (at 50% volume) |
| Bluetooth Version | 5.0 |
| Bluetooth Range | 10 Meters |
| FM Frequency | 87-108MHz |
| Input Options | Bluetooth, TF Card, USB, AUX |
| Charging Port | Micro USB (DC 5V) |
| Material | Wood |
10. Warranty and Support
The PRUNUS J-999 Retro Bluetooth Speaker comes with a limited or full warranty. For detailed warranty information, product support, or any inquiries, please refer to the contact information provided with your purchase or visit the official PRUNUS website.
Manufacturer: PRUNUS