By following these instructions from the official product literature, you can maximize the functionality of your compact audio device.

Avoid leaving the speaker in direct sunlight or inside a hot car, as extreme heat can damage the internal lithium-ion battery.

Short press to skip to the previous song or FM station. Long press to decrease the volume.

Before we provide the download path, a word of caution. Searching for "free PDF manuals" is a top tactic for cybercriminals. Fake download buttons and .exe files disguised as PDFs are common.

is a portable audio device known for its compact metal design and multi-mode playback, including Bluetooth, FM radio, and TF card support. While a single "verified" PDF manual often varies by manufacturer (it is frequently sold under generic or "WSTER" branding), the core operating instructions remain consistent across models. Quick Setup & Controls Power On/Off

Turn the speaker off and back on to reset its discoverable broadcasting status. Clear your phone’s Bluetooth cache if necessary. The FM Radio only outputs static or white noise.

This mode is for connecting non-Bluetooth devices or for saving battery on your phone.

: Full charging takes approximately 2–3 hours , providing roughly 5–10 hours of playback depending on volume . Technical Specifications Output Power : 3W–5W . Bluetooth Range : Up to 10–15 meters .

| Problem | Possible Cause & Solution | | :--- | :--- | | | Solution 1: Battery is completely drained. Charge the speaker for at least 30 minutes. Solution 2: The power switch is in the wrong position. Make sure the physical slider is set to "ON." | | Can't Connect via Bluetooth | Solution 1: Speaker is not in pairing mode. Turn it off, then back on to reset the Bluetooth connection. Solution 2: The speaker is still connected to a different device. Disconnect the other device first. Solution 3: Delete "WS887" or "BT Speaker" from your phone's Bluetooth list, then re-pair it. | | Poor or Distorted Sound Quality | Solution 1: The speaker's volume is too high; lower it to avoid distortion. Solution 2: The source audio file is low quality. Try a different song. Solution 3: The Bluetooth connection is weak. Move your phone closer to the speaker (within 10 meters) and remove physical barriers. | | FM Radio Not Working | Solution 1: Forgot the antenna. A micro-USB or AUX cable must be plugged into the speaker for it to receive a clear signal. Solution 2: You didn't perform an initial station scan. Press and hold the Play/Pause (⏯️) button to auto-scan. | | TF Card / USB Drive Not Read | Solution 1: The card or drive is in the wrong format. The speaker typically reads FAT32 format only. Solution 2: The files are in a non-supported format (like FLAC or AAC). Convert your music to MP3. |