Introduction
Thank you for purchasing the WSTER WS558BT Truck Shaped Bluetooth Speaker. This manual provides detailed instructions for the safe and efficient use of your new portable speaker. Please read this manual thoroughly before use and retain it for future reference.
Package Contents
Ensure all items are present in your package:
- 1 x WSTER WS558BT Speaker
- 1 x USB Charging Cable
- 1 x AUX Audio Cable
- 1 x User Manual
- 1 x Tie (Accessory)

Specifications
| Feature | Specification |
|---|---|
| Brand Name | WSTER |
| Model Number | WS-558BT |
| Speaker Type | Portable, Active |
| Connectivity | Bluetooth (BT 5.0), AUX, USB |
| Wireless Transmission Range | 10 meters |
| Number of Loudspeaker Enclosures | 2 |
| Horn Specification | OD 52mm x 2pcs |
| Speaker Power | 4 Ω / 10W |
| Output Power (PMPO) | 10W |
| Frequency Response | 120Hz-20KHz |
| Audio Noise Ratio | ≥90dB |
| Battery Capacity | 1200mAh |
| Battery Voltage | 3.7V |
| Normal Volume Playing Time | 5-6 hours |
| Charging Voltage | 5V / 500mA |
| Support Memory Card | Yes |
| Support APP | No |
| Waterproof Standard | No |
| Cabinet Material | Plastic |
| Use | Portable Audio Player, Mobile Phone, Computer |
| Function | Play Music, FM Radio |
| Place of Origin | Guangdong, China |
Setup
1. Charging the Speaker
- Connect the provided USB charging cable to the speaker's charging port.
- Connect the other end of the USB cable to a 5V USB power adapter (not included) or a computer's USB port.
- The charging indicator light will illuminate during charging and turn off once fully charged.
- A full charge typically takes 2-3 hours.
2. Power On/Off
- To power on, press and hold the Power button until you hear an audible prompt or see the indicator light.
- To power off, press and hold the Power button again until the speaker shuts down.
Operating Instructions
1. Bluetooth Mode
- Power on the speaker. It will automatically enter Bluetooth pairing mode, indicated by a flashing LED light.
- On your mobile device (smartphone, tablet, computer), enable Bluetooth and search for available devices.
- Select "WS-558BT" from the list of devices.
- Once paired, you will hear a confirmation sound, and the LED light will stop flashing.
- You can now play audio from your device through the speaker.
2. AUX (Audio Input) Mode
- Connect one end of the provided AUX audio cable to the speaker's AUX port.
- Connect the other end to the audio output jack of your external device (e.g., MP3 player, computer).
- The speaker should automatically switch to AUX mode. If not, press the Mode button to cycle through modes until AUX is selected.
3. USB Drive / Memory Card Mode
- Insert a USB flash drive or a memory card (TF/Micro SD) containing MP3 audio files into the respective port on the speaker.
- The speaker will automatically detect the storage device and begin playing music.
- Use the playback controls (Play/Pause, Next/Previous Track) on the speaker to manage your music.
4. FM Radio Mode
- Press the Mode button to switch to FM Radio mode.
- Press the Play/Pause button once to automatically scan and save available FM stations.
- Use the Next/Previous Track buttons to navigate between saved stations.
5. Volume Control
- To increase volume, press and hold the Next Track button.
- To decrease volume, press and hold the Previous Track button.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the speaker's surface. Do not use abrasive cleaners or solvents.
- Storage: Store the speaker in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge the speaker regularly, even if not in use, to maintain battery health.
- Water Exposure: This speaker is NOT waterproof. Avoid exposure to water or high humidity to prevent damage.
Troubleshooting
- Speaker does not power on:
- Ensure the battery is charged. Connect the speaker to a power source using the USB cable and try again after a few minutes. - No sound:
- Check the volume level on both the speaker and your connected device.
- Ensure the correct mode (Bluetooth, AUX, etc.) is selected.
- If using Bluetooth, ensure the speaker is properly paired with your device. - Bluetooth connection issues:
- Make sure the speaker is within the 10-meter wireless range of your device.
- Disconnect and re-pair the speaker with your device.
- Turn off and on both the speaker and your device's Bluetooth function. - Poor FM radio reception:
- Try repositioning the speaker to improve signal reception.
- Ensure the speaker has completed an automatic scan for stations.
User Tips
- For optimal sound quality, place the speaker on a flat, stable surface.
- When using the FM radio, extending the AUX cable (even if not connected to an audio source) can sometimes act as an antenna and improve reception.
- Keep the speaker away from strong electromagnetic fields to prevent interference.
- The unique truck design makes it a great decorative item while providing audio.

Warranty & Support
Your WSTER WS558BT speaker is covered by a standard manufacturer's warranty against defects in materials and workmanship. For specific warranty details, please refer to the documentation provided at the time of purchase or contact your retailer.
For technical support or service inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase for any warranty claims.