1. Introduction
Thank you for purchasing the xdobo SINOBAND 3 Kingdoms Portable Bluetooth Speaker. This manual provides essential information for setting up, operating, and maintaining your device. Please read it carefully before use.
1.1 Package Contents
- xdobo SINOBAND 3 Kingdoms Portable Bluetooth Speaker
- USB-C Charging Cable
- User Manual
1.2 Key Features
- Powerful 40W stereo sound with enhanced bass.
- Up to 20 hours of continuous playtime.
- IPX6 waterproof and rugged design for outdoor use.
- Advanced Bluetooth 5.3 for stable and fast connectivity.
- Dynamic RGB lighting effects.
- Compact and lightweight design for portability.
2. Product Overview
Familiarize yourself with the speaker's components and controls.

Image 1: Front view of the xdobo SINOBAND 3 Kingdoms speaker, showing the control panel and active RGB lighting.
2.1 Control Panel
- Power Button: Press and hold to power on/off. Short press to play/pause.
- Volume Up (+): Short press to increase volume. Long press for next track.
- Volume Down (-): Short press to decrease volume. Long press for previous track.
- Bluetooth Button: Short press to enter Bluetooth pairing mode. Long press to disconnect current device.
- RGB Light Button: Short press to cycle through RGB lighting modes. Long press to turn lights on/off.
- Mode Button (M): Short press to switch between Bluetooth, AUX, USB, and MicroSD modes.
2.2 Ports and Indicators
- USB-C Charging Port: For charging the speaker.
- USB-A Port: For USB drive playback.
- MicroSD Card Slot: For MicroSD card playback.
- AUX-in Port: For wired audio connection.
- LED Indicator: Shows charging status, Bluetooth connection, and mode.
3. Setup
3.1 Charging the Speaker
- Connect the provided USB-C charging cable to the speaker's USB-C port.
- Connect the other end of the cable to a compatible USB power adapter (5V/2A recommended).
- The LED indicator will show charging status and turn off when fully charged. A full charge takes approximately 4 hours.
3.2 Powering On/Off
- To power on, press and hold the Power button for 2-3 seconds until you hear an audible prompt and the RGB lights activate.
- To power off, press and hold the Power button for 2-3 seconds until you hear an audible prompt and the lights turn off.
3.3 Bluetooth Pairing
- Ensure the speaker is powered on and in Bluetooth mode (the LED indicator will flash blue). If not, short press the Mode button to switch.
- Enable Bluetooth on your device (smartphone, tablet, etc.).
- Search for 'xdobo SINOBAND 3 Kingdoms' in your device's Bluetooth list and select it to connect.
- Once connected, the LED indicator will turn solid blue, and you will hear a confirmation sound.

Image 2: Illustration of the Bluetooth 5.3 chip, highlighting the speaker's stable and fast wireless connection.
3.4 True Wireless Stereo (TWS) Pairing
To pair two xdobo SINOBAND 3 Kingdoms speakers for a stereo sound experience:
- Ensure both speakers are powered on and in Bluetooth pairing mode (LED flashing blue).
- On one of the speakers (this will be the primary speaker), long press the Bluetooth button. You will hear a sound indicating TWS pairing mode.
- The two speakers will automatically connect to each other. Once connected, the primary speaker's LED will flash blue, and the secondary speaker's LED will be solid blue.
- Now, connect your device to the primary speaker via Bluetooth as described in section 3.3.

Image 3: Two xdobo SINOBAND 3 Kingdoms speakers demonstrating True Wireless Stereo (TWS) pairing for enhanced audio.
4. Operation
4.1 Music Playback
- Play/Pause: Short press the Power button.
- Volume Up: Short press the '+' button.
- Volume Down: Short press the '-' button.
- Next Track: Long press the '+' button.
- Previous Track: Long press the '-' button.
4.2 RGB Lighting Modes
Short press the RGB Light button to cycle through various lighting effects. Long press to turn the lights on or off.
4.3 AUX-in Mode
Connect an audio device to the speaker's AUX-in port using a 3.5mm audio cable. The speaker will automatically switch to AUX mode, or you can manually select it by short pressing the Mode button.
4.4 USB / MicroSD Playback
Insert a USB drive or MicroSD card into the respective port. The speaker will automatically switch to the corresponding mode and begin playing audio files, or you can manually select the mode by short pressing the Mode button.
5. Maintenance
5.1 Water Resistance (IPX6)
The xdobo SINOBAND 3 Kingdoms speaker is IPX6 waterproof, meaning it can withstand powerful water jets. It is suitable for use in wet environments like poolside or beach. However, it is not designed for submersion in water.

Image 4: The speaker enduring water splashes, illustrating its IPX6 waterproof rating.
5.2 Cleaning and Storage
- Clean the speaker with a soft, damp cloth. Do not use harsh chemicals or abrasive materials.
- Ensure all port covers are securely closed to maintain water resistance.
- Store the speaker in a cool, dry place away from direct sunlight and extreme temperatures.
- For long-term storage, charge the battery to approximately 50% every three months to prolong battery life.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker won't turn on | Low battery; Power button not pressed long enough | Charge the speaker fully; Press and hold the Power button for 2-3 seconds. |
| No sound | Volume too low; Device not connected; Incorrect mode | Increase volume on speaker and device; Re-pair Bluetooth; Ensure correct input mode (Bluetooth, AUX, USB, MicroSD). |
| Bluetooth not connecting | Speaker not in pairing mode; Device Bluetooth off; Interference | Short press Bluetooth button to enter pairing mode; Ensure device Bluetooth is on; Move closer to speaker; Disconnect other Bluetooth devices. |
| TWS pairing failed | Speakers too far apart; Incorrect pairing procedure | Ensure speakers are within 1 meter; Follow TWS pairing steps carefully. |
7. Specifications
| Feature | Detail |
|---|---|
| Model Name | XD-3KD |
| Brand | xdobo |
| Speaker Type | Portable |
| Connectivity Technology | Bluetooth 5.3, USB, AUX, MicroSD |
| Wireless Communication Technology | Bluetooth |
| Speaker Maximum Output Power | 40 Watts |
| Audio Output Mode | Stereo |
| Frequency Response | 20 Hz - 20 kHz (typical) |
| Water Resistance Level | IPX6 Waterproof |
| Playtime | Up to 20 Hours (at 50% volume) |
| Charging Time | Approximately 4 Hours |
| Input Voltage | 5 Volts |
| Item Weight | 718 Grams (1.58 pounds) |
| Product Dimensions | 3.7"D x 8.87"W x 3"H (approx. 9.4cm D x 22.5cm W x 7.6cm H) |
| Material | Fabric |
| Compatible Devices | Bluetooth Enabled Devices |
8. Warranty and Support
The xdobo SINOBAND 3 Kingdoms Portable Bluetooth Speaker comes with a limited warranty. Please refer to the warranty card included in your package for specific terms and conditions. For technical support or customer service, please contact the retailer or visit the official xdobo website.







