1. Introduction
Thank you for choosing the BULIAN CS-4412 Dual 4 Inch Portable Speaker. This speaker is designed to provide high-fidelity stereo sound with dynamic RGB lighting, suitable for both indoor and outdoor environments. It supports multiple playback options including Bluetooth, TF card, USB disk, FM radio, and AUX input, and features TWS (True Wireless Stereo) interconnection for an enhanced audio experience. Please read this manual carefully to ensure proper use and maintenance of your speaker.
2. Safety Information
- Do not expose the speaker to extreme temperatures, direct sunlight, or high humidity.
- Avoid dropping or subjecting the speaker to strong impacts.
- Keep the speaker away from water and other liquids as it is not waterproof.
- Do not attempt to disassemble, repair, or modify the speaker yourself. Contact qualified personnel for service.
- Use only the specified charging voltage (DC 5V) to prevent damage.
3. Package Contents
Please check the box for the following items:
- BULIAN CS-4412 Portable Speaker
- USB Charging Cable
- User Manual
4. Product Overview
Familiarize yourself with the speaker's features and controls:
5. Setup
5.1 Initial Charging
Before first use, fully charge the speaker. Connect the provided USB charging cable to the DC 5V port on the speaker and a suitable USB power adapter (not included). The charging indicator light will show the charging status.
5.2 Powering On/Off
To power on the speaker, slide the ON/OFF switch to the 'ON' position. To power off, slide it to the 'OFF' position.
6. Operating Instructions
6.1 Bluetooth Pairing
- Turn on the speaker. It will automatically enter Bluetooth pairing mode, indicated by a flashing light or voice prompt.
- Enable Bluetooth on your device (smartphone, tablet, etc.).
- Search for available Bluetooth devices and select 'CS-4412' from the list.
- Once connected, the speaker will indicate successful pairing.
6.2 TWS (True Wireless Stereo) Pairing
To achieve a true wireless stereo experience with two CS-4412 speakers:
- Ensure both speakers are powered on and not connected to any Bluetooth device.
- Press and hold the 'MODE' button on one of the speakers (this will be your primary speaker) until you hear a pairing tone.
- The two speakers will automatically connect to each other.
- Once paired, connect your device to the primary speaker via Bluetooth as described in section 6.1.
6.3 Playing Music
- Bluetooth Mode: After successful pairing, play music from your connected device.
- TF Card/USB Disk Mode: Insert a TF card or USB disk with MP3 audio files into the respective slot. The speaker will automatically switch to the corresponding mode and begin playback.
- AUX Mode: Connect an external audio device using a 3.5mm AUX cable (not included) to the AUX input. Press the 'MODE' button to switch to AUX mode.
6.4 FM Radio
Press the 'MODE' button to switch to FM radio mode. Use the Previous/Next Track buttons to scan for radio stations. For better reception, ensure the speaker is in an open area.
6.5 Microphone Usage
Connect a wired microphone (not included) to the MIC input port. Adjust the microphone volume using the 'MIC.VOL' knob. This feature is ideal for karaoke or public speaking.
6.6 RGB Lighting Control
Press the 'LED' button on the control panel to cycle through different RGB lighting modes or to turn the lights off.
6.7 Sound Modes / EQ
Press the 'EQ' button to switch between various sound modes such as Hi-Res Sound, 3D Surround Sound, Immersive Sound, Stereo Sound, Live Sound, Extra Bass, and Standard Mode, optimizing your listening experience.
7. Specifications
| Feature | Specification |
|---|---|
| Model | CS-4412 |
| Bluetooth Version | 5.2 |
| Dimensions (H x W x D) | 398mm x 176mm x 164mm |
| Wireless Transmission Distance | 10m |
| Output Power | 5W x 2 (10W PMPO) |
| Charging Voltage | DC 5V |
| Supported Card Types | USB Drive, TF Card |
| Signal-to-Noise Ratio (SNR) | ≥85dB |
| Loudspeaker Units | 2 x 4-inch Full-Range Speakers |
| Battery Capacity | 1500mAh |
| Frequency Response | 45Hz-18KHz |
| Impedance | 4 Ohm |
| Audio Crossover | Full-Range |
| Features | Bluetooth, TF Card, USB Drive, AUX input, Microphone input, TWS, RGB Lights, FM Radio, Volume Control, EQ |
| Material | Plastic |
| Power Source | Battery, USB |
| Waterproof | No |
| Voice Control | No |
| Display Screen | No |
| Support APP | No |
| Certifications | CE, FCC, RoHS, UL |
8. Maintenance
- Cleaning: Use a soft, dry cloth to clean the speaker's exterior. Do not use abrasive cleaners or solvents.
- Storage: Store the speaker in a cool, dry place away from direct sunlight and extreme temperatures when not in use for extended periods.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge the speaker regularly, even if not in use, to maintain battery health.
9. Troubleshooting
- No Power: Ensure the speaker is charged. Connect the charging cable and check if the charging indicator lights up.
- No Sound: Check the volume levels on both the speaker and your connected device. Ensure the correct input mode is selected (Bluetooth, TF, USB, AUX).
- Bluetooth Pairing Issues: Make sure the speaker is in pairing mode and within the 10m transmission range. Disconnect the speaker from any previously paired devices and try pairing again.
- Poor FM Reception: Extend the antenna (if applicable) and try moving the speaker to an open area away from interference.
- TWS Pairing Failure: Ensure both speakers are not connected to any other Bluetooth device before initiating TWS pairing.
10. User Tips
- Optimal Sound Performance: For the best audio experience, ensure the speaker is fully charged. The dual 5W speakers provide clear stereo sound suitable for home and outdoor use.
- Enhance Bass: Utilize the 'EQ' button to select the 'Extra Bass Mode' for a more powerful low-frequency response.
- Dynamic Lighting: Experiment with the 'LED' button to find your preferred RGB light mode to match your mood or environment.
11. Warranty and Support
For any issues or questions not covered in this manual, please contact the seller or authorized service center for assistance. Keep your purchase receipt as proof of purchase for warranty claims.
12. Product Demonstration Video
Watch this video for a visual demonstration of the speaker's features and RGB lighting effects.
