1. Introduction
Thank you for choosing the Hoco BS31 Bright Sound Sports Wireless Speaker. This manual provides essential information for the proper setup, operation, and maintenance of your device. Please read it thoroughly before use to ensure optimal performance and longevity.
2. Product Overview and Features
The Hoco BS31 is a compact and portable wireless speaker designed for versatile audio playback. It features robust connectivity options and a durable design, making it suitable for various environments.
- Wireless V4.2 JLAC6928B for stable and efficient connection.
- Integrated 53mm speaker for clear audio output.
- Class A polymer battery with 500mAh capacity for extended playback.
- Multiple playback modes: Wireless (Bluetooth), TF card, and AUX input.
- Compact and lightweight design, weighing only 140g.
- Supports A2DP, AVRCP, HFP, HSP protocols for broad compatibility.

Image: Front view of the Hoco BS31 speaker in army green, showcasing its compact design and front controls.

Image: The Hoco BS31 speaker held in a hand, demonstrating its small, palm-sized, and portable nature.
3. Package Contents
Please check the package for the following items:
- Hoco BS31 Wireless Speaker
- USB Charging Cable
- User Manual
4. Controls and Interfaces
Familiarize yourself with the speaker's buttons and ports for proper operation.

Image: A diagram illustrating the functions of the control buttons on the Hoco BS31 speaker.
- Power Button (⏻): Press and hold to switch on/off. Short press to play/pause music or answer/end calls.
- Previous Song / Volume Up (⏮): Short press for previous song. Long press to increase volume.
- Next Song / Volume Down (⏭): Short press for next song. Long press to decrease volume.
- Mode Button (⏸): Short press to switch between Bluetooth, TF card, and AUX modes.

Image: Rear view of the Hoco BS31 speaker, highlighting the DC 5V charging port, TF card slot, and AUX input.
- DC 5V Port: For charging the speaker using the provided USB cable.
- TF Card Slot: Insert a TF (MicroSD) card for direct music playback.
- AUX Port: Connect external audio devices using a 3.5mm audio cable.
5. Setup
5.1. Charging the Speaker
Before first use, fully charge the speaker. Connect the provided USB charging cable to the DC 5V port on the speaker and the other end to a USB power adapter (not included) or a computer's USB port. The charging time is approximately 2 hours. The indicator light will show charging status (e.g., red for charging, off when fully charged).
5.2. Powering On/Off
To power on the speaker, press and hold the Power button (⏻) until you hear an audible prompt. To power off, press and hold the Power button again until the speaker shuts down.
6. Operating Instructions
6.1. Bluetooth Pairing
- Ensure the speaker is powered on and in Bluetooth pairing mode (indicated by a flashing blue light or audible prompt). If not, short press the Mode button (⏸) to switch to Bluetooth mode.
- On your mobile device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "Hoco BS31" from the list of found devices.
- Once paired, the speaker will indicate a successful connection (e.g., solid blue light or audible prompt).
- You can now play audio from your device through the Hoco BS31 speaker.
6.2. TF Card Mode
Insert a TF (MicroSD) card with MP3 audio files into the TF card slot. The speaker will automatically detect the card and switch to TF card playback mode. Use the Previous/Next Song buttons to navigate tracks.
6.3. AUX Mode
Connect one end of a 3.5mm audio cable (not included) to the AUX port on the speaker and the other end to the audio output jack of your external device (e.g., MP3 player, computer). The speaker will automatically switch to AUX mode. Control playback from your external device.

Image: Visual representation of the Hoco BS31's multiple connection methods, including Bluetooth, TF card, and AUX.
6.4. Music Playback and Call Functions
- Play/Pause: Short press the Power button (⏻).
- Next Song: Short press the Next Song button (⏭).
- Previous Song: Short press the Previous Song button (⏮).
- Volume Up: Long press the Previous Song button (⏮).
- Volume Down: Long press the Next Song button (⏭).
- Answer/End Call: Short press the Power button (⏻) when a call comes in.
- Reject Call: Press and hold the Power button (⏻) when a call comes in.

Image: The Hoco BS31 speaker positioned next to a smartphone, demonstrating its use for music playback.
7. Maintenance and Care
- Keep the speaker dry. Do not expose it to water or excessive moisture.
- Clean the speaker with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Avoid extreme temperatures. Do not store the speaker in very hot or cold environments.
- Do not attempt to disassemble or repair the speaker yourself. This will void the warranty and may cause damage.
- Charge the speaker regularly, even if not in use, to maintain battery health.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not power on. | Low battery. | Charge the speaker for at least 30 minutes. |
| Cannot pair with Bluetooth device. | Speaker not in pairing mode; device Bluetooth off; too far apart. | Ensure speaker is in pairing mode. Turn Bluetooth on/off on device. Move devices closer. |
| No sound. | Volume too low; incorrect mode; device not playing. | Increase speaker/device volume. Check correct mode (BT, TF, AUX). Ensure audio is playing on source device. |
| TF card not recognized. | Card inserted incorrectly; unsupported format; corrupted card. | Reinsert TF card. Ensure files are MP3 format. Try a different TF card. |
9. Specifications
| Feature | Detail |
|---|---|
| Model | BS31 |
| Speaker Size | 53mm |
| Dimensions | 86 x 86 x 44 mm |
| Weight | 140g |
| Wireless Version | V4.2 (JLAC6928B) |
| Supported Protocols | A2DP, AVRCP, HFP, HSP |
| Battery Capacity | 500mAh (Class A polymer battery) |
| Charging Voltage | DC 5V |
| Charging Time | Approximately 2 hours |
| Music/Call Time | Approximately 3 hours |
| Connectivity Options | Wireless (Bluetooth), TF card, AUX |
| Maximum Output Power | 5 Watts |
10. Warranty and Support
Hoco products are manufactured to high quality standards. For warranty information and technical support, please refer to the warranty card included with your product or visit the official Hoco website.
Official Website: www.hocotech.com





