1. Introduction
Welcome to your new WSTER Portable Bluetooth Speaker WS-338. This manual provides essential information for setting up, operating, and maintaining your device. Please read these instructions carefully before use to ensure optimal performance and longevity of your speaker.
2. Product Overview
2.1 Package Contents
- WSTER Portable Bluetooth Speaker WS-338
- Power Cable
- Quick Start Guide
2.2 Speaker Components
Familiarize yourself with the various parts and controls of your speaker.

Front view of the WSTER Portable Bluetooth Speaker WS-338, showcasing its compact, oval design with an orange trim and black speaker grille.

The rear panel of the speaker features a USB port for media playback, a TF card slot for direct music access, and a DC5V port for charging the device.

The bottom of the speaker houses the control panel, including buttons for play/pause, track navigation, volume adjustment, and mode selection.
This video demonstrates the physical features and portability of the WSTER Portable Bluetooth Speaker WS-338, highlighting its compact size and various input ports.
3. Setup
3.1 Charging the Speaker
Before first use, fully charge the speaker. Connect the provided power cable to the DC5V port on the speaker and a compatible USB power adapter (not included). The LED indicator will illuminate during charging and turn off or change color when fully charged.
3.2 Powering On/Off
Press and hold the power button (often integrated with the mode button) for a few seconds to turn the speaker on or off. A sound prompt will indicate the power status.
4. Operating Instructions
4.1 Bluetooth Pairing
- Ensure the speaker is powered on and in Bluetooth mode. The LED indicator will flash, indicating it is ready for pairing.
- On your device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "WS-338" from the list of devices. A confirmation sound will indicate successful pairing.

This image illustrates the process of pairing the WSTER WS-338 speaker with a smartphone via Bluetooth, showing the speaker's compact size in hand.
4.2 TWS (True Wireless Stereo) Pairing
To achieve true stereo sound, you can pair two WS-338 speakers together.
- Power on both WS-338 speakers.
- On one of the speakers, press the TWS button (or the designated pairing button). It will search for the other speaker.
- Once connected, both speakers will play audio in stereo. Then, pair your device to the primary speaker via Bluetooth as described above.

This image demonstrates the True Wireless Stereo (TWS) pairing feature, showing two WS-338 speakers connected to deliver a wider stereo sound experience.
4.3 LED Light Modes
The speaker features a dynamic RGB light strip. Press the dedicated LED light button (if available, or cycle through modes using the mode button) to change between different light effects or to turn them off.
4.4 Playback Controls
- Play/Pause: Press the Play/Pause button.
- Next Track: Press the "Next" button.
- Previous Track: Press the "Previous" button.
- Volume Up: Press the "+" button.
- Volume Down: Press the "-" button.
4.5 Call Functions
When connected via Bluetooth, the built-in microphone allows for hands-free calls. Press the Play/Pause button to answer or end an incoming call.
4.6 Other Input Modes (USB, TF Card)
Insert a USB drive or TF card into the corresponding port on the speaker to play music directly from these storage devices. The speaker will automatically switch to the appropriate mode. Ensure your audio files are in a compatible format.
5. Maintenance
5.1 Cleaning
Wipe the speaker with a soft, dry cloth. Do not use abrasive cleaners, solvents, or immerse the device in water. Ensure all ports are dry before charging or connecting other devices.
5.2 Storage
Store the speaker in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity. If storing for an extended period, charge the battery periodically to maintain its health.
6. Troubleshooting
6.1 No Power
- Ensure the speaker is fully charged. Connect the power cable and check the charging indicator.
- Press and hold the power button for a longer duration (3-5 seconds).
6.2 Cannot Pair via Bluetooth
- Make sure the speaker is in Bluetooth pairing mode (LED flashing).
- Turn off and then on your device's Bluetooth.
- Ensure no other devices are currently connected to the speaker.
- Move the speaker closer to your device.
6.3 No Sound
- Check the volume levels on both the speaker and your connected device.
- Ensure the correct input mode (Bluetooth, USB, TF) is selected.
- If using Bluetooth, ensure the speaker is properly paired.
6.4 TWS Pairing Fails
- Ensure both speakers are WS-338 models and are within close proximity (within 10 meters).
- Try resetting both speakers by powering them off and on, then attempt TWS pairing again.
7. Specifications
7.1 General
- Model Name: WS-338
- Brand: WSTER
- Product Dimensions: 3.46"D x 3.46"W x 3.85"H
- Item Weight: 285 Grams (10.1 ounces)
- Material: Acrylonitrile Butadiene Styrene (ABS)
- Indoor/Outdoor Usage: Indoor, Outdoor
7.2 Audio
- Speaker Type: Portable Speaker
- Speaker Maximum Output Power: 8 Watts
- Frequency Response: 18 KHz
- Audio Output Mode: Stereo
7.3 Connectivity
- Wireless Communication Technology: Bluetooth 5.3
- Connectivity Technology: Bluetooth
7.4 Power
- Input Voltage: DC-5V
- Battery: 1 Nonstandard Battery (included)
7.5 Features
- Special Feature: LED Light, Portable
- Included Components: Power Cable, Quick Start Guide
8. Safety Information
8.1 Important Safety Instructions
- Do not expose the speaker to extreme temperatures, direct sunlight, or high humidity.
- Avoid dropping or subjecting the speaker to strong impacts.
- Do not disassemble or attempt to repair the speaker yourself. This will void the warranty.
- Keep out of reach of children.
- Dispose of batteries and electronic components responsibly according to local regulations.
- Use only the provided power cable or a certified equivalent for charging.
9. Warranty and Support
9.1 Warranty Information
Please refer to the Quick Start Guide included in your package for specific warranty details and terms. The warranty typically covers manufacturing defects for a specified period from the date of purchase.
9.2 Customer Support
For technical support, service inquiries, or questions regarding your WSTER Portable Bluetooth Speaker WS-338, please visit the official WSTER website or contact your retailer for assistance.