1. Introduction
Thank you for choosing the WSTER WS-558 Portable Wireless Car Model Bluetooth Speaker. This device combines a unique retro pickup truck design with advanced audio features, offering a versatile listening experience. This manual provides detailed instructions for setup, operation, and maintenance to ensure optimal performance and enjoyment of your speaker.

Image 1.1: The WSTER WS-558 Portable Wireless Car Model Bluetooth Speaker in Red.
2. What's in the Box
Upon opening your package, please verify that all the following items are included:
- 1 x WSTER WS-558 Portable Wireless Car Model Bluetooth Speaker
- 1 x Power Cable (Type-C)
- 1 x Quick Start Guide

Image 2.1: Packaging contents for the WS-558 speaker.
3. Product Overview
Familiarize yourself with the speaker's components and controls:

Image 3.1: Top view of the WS-558 speaker showing control buttons.
- Power/Mode Button (⑂/M): Press and hold to power on/off. Briefly press to switch between modes (Bluetooth, FM Radio, USB, TF Card).
- Play/Pause/Call Button (▶/▌▌/☎): Briefly press to play/pause music. Briefly press to answer/end calls. Press and hold to reject calls. Double-click for TWS pairing.
- Previous Track/Volume Down Button (◀◀): Briefly press for previous track. Press and hold to decrease volume.
- Next Track/Volume Up Button (▶▶): Briefly press for next track. Press and hold to increase volume.
- USB Port: For USB drive playback.
- TF Card Slot: For TF (MicroSD) card playback.
- Type-C Charging Port: For charging the speaker.
- LED Display: Shows current mode, volume, and other information.

Image 3.2: Close-up of the speaker's control panel and various ports.
4. Setup
4.1. Charging the Speaker
Before first use, fully charge the speaker using the provided Type-C USB cable. Connect the cable to the speaker's Type-C charging port and a compatible USB power adapter (not included). The LED display will indicate charging status.
4.2. Power On/Off
To power on the speaker, press and hold the Power/Mode (⑂/M) button for approximately 3 seconds until you hear a startup sound and the LED display illuminates.
To power off the speaker, press and hold the Power/Mode (⑂/M) button again for approximately 3 seconds until you hear a shutdown sound and the LED display turns off.
Video 4.1: Demonstrates powering on and off the speaker (0:04 - 0:26).
4.3. Bluetooth Pairing
After powering on, the speaker will automatically enter Bluetooth pairing mode, indicated by "BLUE" on the LED display and a flashing Bluetooth icon. To connect your device:
- Enable Bluetooth on your smartphone or tablet.
- Search for available Bluetooth devices.
- Select "WS-558" from the list.
- Once connected, you will hear a confirmation tone, and "BLUE" will stop flashing.

Image 4.1: Bluetooth connection process shown with a smartphone.
Video 4.2: Demonstrates Bluetooth connection (0:26 - 0:40).
5. Operating Instructions
5.1. Playing Music (Bluetooth Mode)
Once connected via Bluetooth, you can control music playback directly from your device or using the speaker's buttons:
- Play/Pause: Briefly press the Play/Pause (▶/▌▌) button.
- Volume Up: Press and hold the Next Track/Volume Up (▶▶) button.
- Volume Down: Press and hold the Previous Track/Volume Down (◀◀) button.
- Next Track: Briefly press the Next Track/Volume Up (▶▶) button.
- Previous Track: Briefly press the Previous Track/Volume Down (◀◀) button.
Video 5.1: Demonstrates music playback controls including play/pause, volume adjustment, and track skipping (0:40 - 1:26).
5.2. Switching Modes
The WS-558 supports multiple playback modes. To switch between modes (Bluetooth, FM Radio, USB, TF Card), briefly press the Power/Mode (⑂/M) button.
Video 5.2: Demonstrates switching between different modes (1:26 - 1:52).
5.3. FM Radio Mode
To use the FM Radio function:
- Switch to FM Radio mode by briefly pressing the Power/Mode (⑂/M) button until "FM" appears on the display.
- To auto-scan and save available stations, press and hold the Play/Pause (▶/▌▌) button. The speaker will scan frequencies and store stations automatically.
- Once scanning is complete, briefly press the Previous Track (◀◀) or Next Track (▶▶) buttons to navigate through the saved stations.
Video 5.3: Demonstrates the operation process of FM radio mode (1:52 - 2:26).
5.4. USB/TF Card Playback
Insert a USB drive or TF (MicroSD) card into the respective port. The speaker will automatically switch to the corresponding mode and begin playing audio files. Use the Play/Pause (▶/▌▌), Previous Track (◀◀), and Next Track (▶▶) buttons to control playback.
5.5. Hands-Free Calling
When connected via Bluetooth, the speaker can be used for hands-free calls:
- Answer Call: When an incoming call rings, briefly press the Play/Pause/Call (▶/▌▌/☎) button.
- End Call: During a call, briefly press the Play/Pause/Call (▶/▌▌/☎) button.
- Reject Call: When an incoming call rings, press and hold the Play/Pause/Call (▶/▌▌/☎) button.
- Switch Audio Source: During a call, briefly press the Play/Pause/Call (▶/▌▌/☎) button to switch the audio between the speaker and your mobile phone.

Image 5.1: Hands-free calling feature in use.
Video 5.4: Demonstrates answering and managing calls (2:26 - 2:55).
5.6. TWS (True Wireless Stereo) Pairing
If you have two WS-558 speakers, you can pair them together for a true stereo audio experience:
- Ensure both speakers are powered on and in Bluetooth mode, but not connected to any device.
- On one of the speakers (this will be the primary speaker), double-click the Play/Pause (▶/▌▌) button. You will hear a
