1. Introduction
This manual provides detailed instructions for the operation and maintenance of your Smile S666 Multimedia Speaker. Please read this manual thoroughly before using the product to ensure proper functionality and to prevent damage.
2. Safety Information
To ensure safe operation and prolong the lifespan of your speaker, please observe the following precautions:
- Do not expose the speaker to water or excessive moisture. This product is not water-resistant.
- Avoid placing the speaker in direct sunlight or near heat sources.
- Do not disassemble or attempt to repair the speaker yourself. Refer all servicing to qualified personnel.
- Use only the power adapter and cables provided or recommended by the manufacturer.
- Keep out of reach of children.
3. Package Contents
Please check the package for the following items:
- Smile S666 Multimedia Speaker
- USB Power Cable
- Audio Cable (3.5mm Jack)
- User Manual

Figure 3.1: The Smile S666 Multimedia Speaker as packaged in its retail box.
4. Product Overview
The Smile S666 is a compact multimedia speaker designed for desktop use, offering clear audio output for your computer or other compatible devices.
4.1 Components
- Main Speaker Unit: Houses the audio drivers and control circuitry.
- Volume Knob: Located on the top surface, used to adjust audio output level.
- USB Power Port: For connecting the speaker to a power source.
- Audio Input Port (3.5mm): For connecting to audio sources like computers, phones, etc.


Figure 4.1: Front and top view of the Smile S666 Multimedia Speaker, showing the speaker grille and volume knob. The speaker is available in different finishes, including wood grain and black.
5. Setup
Follow these steps to set up your Smile S666 Multimedia Speaker:
- Placement: Place the speaker on a stable, flat surface near your computer or audio source. Ensure there is adequate ventilation around the speaker.
- Connect Power: Insert the USB power cable into the speaker's USB power port. Connect the other end of the USB cable to a powered USB port on your computer or a USB wall adapter (5V/1A recommended).
- Connect Audio: Insert one end of the 3.5mm audio cable into the audio input port on the speaker. Connect the other end of the 3.5mm audio cable to the headphone jack or audio output port of your computer, laptop, or other audio device.
- Power On: The speaker will typically power on automatically once connected to a power source. Some models may have a power switch integrated with the volume knob; turn the knob clockwise until you hear a click to power on.
6. Operating Instructions
6.1 Adjusting Volume
Rotate the volume knob on the top of the speaker clockwise to increase the volume and counter-clockwise to decrease it. You can also adjust the volume from your connected device.
6.2 Audio Playback
Once connected, play audio from your computer or device. The sound will be output through the Smile S666 speaker.
7. Maintenance
To keep your speaker in optimal condition:
- Cleaning: Use a soft, dry cloth to wipe the exterior of the speaker. Do not use liquid cleaners or abrasive chemicals.
- Storage: When not in use for extended periods, store the speaker in a cool, dry place, away from direct sunlight and extreme temperatures.
- Cable Care: Avoid bending or crimping the power and audio cables excessively.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound | Speaker not powered on; Cables not connected properly; Volume too low; Incorrect audio output selected on device. | Ensure speaker is powered on; Check all cable connections; Increase speaker and device volume; Select the correct audio output on your computer/device. |
| Distorted sound | Volume too high; Poor audio source quality; Damaged cable. | Lower the volume; Try a different audio source; Replace the audio cable. |
| Speaker not recognized by computer | Driver issue (rare for plug-and-play speakers); USB port issue. | Try a different USB port; Restart your computer. |
9. Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 40 x 5 x 5 cm |
| First Available Date | August 7, 2023 |
| Manufacturer | smail |
| ASIN | B0CDZBFRQ5 |
| Brand Name (as listed) | General |
| Connectivity Technology | Wired (3.5mm Audio Jack), Bluetooth |
| Mounting Type | Tabletop Mount |
| Model Name | S666 |
| Speaker Type | Multimedia |
| Compatible Devices | Personal Computer |
| Subwoofer Diameter | 12 inches |
| Color | Vibrant Color |
| Water Resistance | No |
10. Warranty and Support
This product comes with a standard manufacturer's warranty. For specific warranty terms and conditions, please refer to the warranty card included in the package or contact your point of purchase. For technical support or service inquiries, please contact the retailer or manufacturer directly.
For further assistance, you may visit the manufacturer's website or contact their customer service department. Keep your purchase receipt as proof of purchase for warranty claims.