1. Product Overview
The havit SK905BT is a portable Bluetooth speaker designed for high-quality audio playback with versatile connectivity and robust features. It offers a powerful 20W sound output, IPX7 waterproof rating, and a long-lasting battery for extended use.

Image 1.1: havit Classic I Wireless Speaker, showcasing its retro design.
2. Package Contents
Please check the package for the following items:
- havit SK905BT Portable Bluetooth Speaker
- USB Type-C Charging Cable
- AUX Cable
- User Manual
3. Device Layout

Image 3.1: Top view of the speaker with control buttons and LED indicators.

Image 3.2: Side view of the speaker, illustrating the protective cover for the input ports.
Controls and Indicators:
- Power Button: Press and hold to power on/off.
- Play/Pause Button: Press to play or pause audio.
- Volume Up (+): Press to increase volume.
- Volume Down (-): Press to decrease volume.
- Previous Track: Press and hold Volume Down.
- Next Track: Press and hold Volume Up.
- Mode Button: Press to switch between input modes (Bluetooth, AUX, TF Card).
- LED Indicators: Display battery status and connection mode.
Ports:
- Type-C Charging Port: For charging the speaker.
- AUX Input: For wired audio connection.
- TF Card Slot: For playing music directly from a TF (MicroSD) card.
4. Setup
4.1 Charging the Speaker
Before first use, fully charge the speaker. Connect the provided USB Type-C charging cable to the speaker's Type-C port and the other end to a compatible USB power adapter (not included). The LED indicators will show charging status. A full charge takes approximately 3 hours and provides up to 25 hours of playtime.

Image 4.1: Charging the speaker via Type-C port and battery endurance details.
4.2 Powering On/Off
- To power on, press and hold the Power button until the LED indicators light up.
- To power off, press and hold the Power button until the LED indicators turn off.
5. Operating Your Speaker
5.1 Bluetooth Pairing
- Ensure the speaker is powered on and in Bluetooth pairing mode (LED indicator will flash).
- On your device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "havit SK905BT" from the list of devices.
- Once connected, the LED indicator will stop flashing and remain solid.
The speaker uses Bluetooth V5.3 for a stable connection up to 10 meters without obstacles.
5.2 TWS (True Wireless Stereo) Pairing
To achieve a stereo sound experience, you can pair two havit SK905BT speakers together:
- Ensure both speakers are powered on and not connected to any other Bluetooth device.
- On one speaker, press and hold the TWS pairing button (refer to device layout for specific button, usually indicated by a chain link icon or similar).
- The speakers will automatically search and pair with each other. A confirmation tone will sound once paired.
- Connect your device to one of the paired speakers via Bluetooth as described in section 5.1. Both speakers will now play audio in stereo.

Image 5.1: Illustration of TWS pairing and hands-free call functionality.
5.3 Audio Input Options
- AUX Input: Connect an audio device using the provided 3.5mm AUX cable to the speaker's AUX port. The speaker will automatically switch to AUX mode or you may need to press the Mode button.
- TF Card Playback: Insert a TF (MicroSD) card with audio files into the TF card slot. The speaker will automatically detect the card and begin playing music.
5.4 Hands-Free Calls and Voice Assistant
The speaker features an integrated microphone for hands-free calling. When a call comes in while connected via Bluetooth, press the Play/Pause button to answer or end the call. Press and hold the Play/Pause button to reject a call.
To activate your device's voice assistant (e.g., Siri, Google Assistant), press the Voice Assistant button (if available, otherwise refer to your device's instructions for activating via Bluetooth accessory).
6. Maintenance
6.1 Cleaning
Wipe the speaker with a soft, dry cloth. Do not use abrasive cleaners, alcohol, or other chemical solvents, as these may damage the surface.
6.2 Water Resistance (IPX7)
The speaker has an IPX7 waterproof rating, meaning it can withstand immersion in water up to 1 meter for 30 minutes. Ensure the port cover is securely closed before exposing the speaker to water. Avoid prolonged immersion or exposure to saltwater or other chemicals.

Image 6.1: The speaker demonstrating its IPX7 waterproof capability.
6.3 Storage
Store the speaker in a cool, dry place away from direct sunlight and extreme temperatures. If storing for an extended period, charge the battery periodically to maintain its lifespan.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not power on | Low battery | Charge the speaker fully. |
| Cannot pair via Bluetooth | Speaker not in pairing mode; device Bluetooth off; too far apart | Ensure speaker is in pairing mode, enable Bluetooth on device, keep devices within 10m. |
| No sound | Volume too low; incorrect input mode; faulty cable | Increase volume, check input mode (Bluetooth, AUX, TF Card), test with another cable. |
| TWS pairing fails | Speakers already connected to other devices | Disconnect both speakers from any Bluetooth devices before initiating TWS pairing. |
8. Specifications

Image 8.1: Comprehensive technical specifications of the speaker.
| Feature | Detail |
|---|---|
| Model Number | SK905BT |
| Bluetooth Version | V5.3 |
| Wireless Working Range | Up to 10m (without obstacles) |
| Speaker Maximum Output Power | 20W |
| Frequency Response | 20000 Hz |
| Waterproof Rating | IPX7 |
| Playtime | Up to 25 hours |
| Charging Time | Approx. 3 hours |
| Charging Port | Type-C |
| Input Options | Bluetooth, AUX, TF Card |
| Dimensions | 5 x 10 x 10 cm |
| Weight | 487g ± 5g |
9. Warranty and Support
This product comes with a standard manufacturer's warranty. For detailed warranty information, please refer to the warranty card included in your package or contact havit customer support. If you encounter any issues or have questions regarding your havit SK905BT speaker, please reach out to our support team for assistance.





