1. Introduction
Thank you for purchasing the comiso C17 Small Bluetooth Speaker. This manual provides essential information for setting up, operating, and maintaining your speaker. Please read it carefully before use to ensure optimal performance and longevity of the device.
2. Safety Information
- Do not expose the speaker to extreme temperatures or direct sunlight for extended periods.
- Avoid dropping or subjecting the speaker to strong impacts.
- Do not attempt to disassemble, repair, or modify the speaker yourself. Contact qualified service personnel if needed.
- Keep the speaker away from medical devices, as it may interfere with their operation.
- Ensure the charging port cover is securely closed when the speaker is exposed to water to maintain its IPX7 waterproof rating.
3. Package Contents
Verify that all items are present in your package:
- comiso C17 Mini Portable Bluetooth Speaker
- USB Type-C Charging Cable
- Lanyard
- Welcome Guide (this manual)
4. Product Overview
The comiso C17 speaker is designed for portability and robust sound. It features a compact design with a durable ABS plastic shell and a silicone base. The Type-C charging port includes an indicator light for convenience.

Image: The comiso C17 Small Bluetooth Speaker in Sky Blue, held in a hand with water splashes, showcasing its compact size and waterproof design.

Image: An exploded view illustrating the internal components of the comiso C17 speaker, highlighting the 5W full-range high-performance driver and passive subwoofer for enhanced bass.
5. Setup
5.1. Charging the Speaker
- Locate the Type-C charging port on the speaker.
- Connect the provided USB Type-C cable to the speaker's charging port.
- Connect the other end of the USB cable to a compatible USB power adapter (not included) or a computer's USB port.
- The indicator light near the charging port will illuminate during charging and turn off when fully charged.
- A full charge typically takes approximately 2 hours.
5.2. Power On/Off
- To power on: Press and hold the power button until you hear an audible prompt.
- To power off: Press and hold the power button again until you hear an audible prompt.
5.3. Bluetooth Pairing
The comiso C17 uses Bluetooth 5.3 for stable and efficient connections.
- Ensure the speaker is powered on and in pairing mode (indicated by a flashing LED light).
- On your device (smartphone, tablet, laptop), enable Bluetooth.
- Search for available Bluetooth devices. The speaker will appear as "C17" or "comiso C17".
- Select "C17" or "comiso C17" to connect. Once connected, you will hear a confirmation sound, and the LED light will become solid.

Image: The comiso C17 speaker positioned among various compatible devices including laptops, tablets, and smartphones, illustrating its wide compatibility with Bluetooth 5.3 technology.
5.4. TWS (True Wireless Stereo) Pairing
For an immersive 360° stereo sound experience, you can pair two comiso C17 speakers together.
- Ensure both C17 speakers are powered on and not connected to any other Bluetooth device.
- On one of the speakers (this will be the primary speaker), double-press the power button. You will hear a prompt indicating it's searching for another speaker.
- The two speakers will automatically connect to each other. A confirmation sound will indicate successful TWS pairing.
- Now, connect your device to the primary speaker via Bluetooth as described in section 5.3. Both speakers will play audio simultaneously.

Image: Two comiso C17 speakers placed on a desk next to a laptop, demonstrating TWS pairing for a stereo audio experience.
6. Operating Instructions
6.1. Playing Audio
- Once connected via Bluetooth, play audio from your paired device. The sound will be transmitted through the comiso C17 speaker.
- Use your device's controls to play, pause, skip tracks, or adjust volume.
6.2. Hands-Free Calling
The speaker features a built-in microphone for hands-free calls.
- When a call comes in, the speaker will ring. Press the power button once to answer the call.
- To end a call, press the power button once again.
- To reject an incoming call, press and hold the power button.
6.3. Volume Control
Adjust the volume directly from your connected device.
7. Maintenance
7.1. Cleaning
Wipe the speaker with a soft, damp cloth. Do not use abrasive cleaners, alcohol, or chemical solvents, as these may damage the surface.
7.2. Waterproof Care (IPX7)
The comiso C17 speaker is IPX7 waterproof, meaning it can be immersed in water up to one meter deep for 30 minutes. To maintain its waterproof integrity:
- Ensure the Type-C charging port cover is completely sealed before exposing the speaker to water.
- Do not expose the speaker to saltwater or other chemicals. If it comes into contact with such substances, rinse it with fresh water and dry thoroughly.
- Do not charge the speaker if the charging port or cable is wet.

Image: The comiso C17 speaker partially submerged in water with splashes, demonstrating its IPX7 waterproof capability.
7.3. Storage
Store the speaker in a cool, dry place away from direct sunlight and extreme temperatures when not in use for extended periods.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not power on. | Low battery. | Charge the speaker for at least 30 minutes. |
| Cannot pair with device. | Bluetooth is off on device; speaker is already paired; speaker is out of range. | Ensure Bluetooth is enabled on your device. Disconnect from other devices. Move speaker closer to your device (within 10 meters). |
| No sound or low volume. | Volume too low on speaker or device; device not connected. | Increase volume on both the speaker and your device. Re-establish Bluetooth connection. |
| TWS pairing fails. | Speakers are already connected to a device; speakers are too far apart. | Ensure both speakers are disconnected from other devices before TWS pairing. Place speakers close to each other. |
| Poor call quality. | Weak signal; microphone obstruction. | Move closer to your phone. Ensure the microphone area is clear. |
9. Specifications
| Feature | Specification |
|---|---|
| Model Name | C17A |
| Speaker Type | Portable |
| Connectivity Technology | Bluetooth 5.3 |
| Speaker Maximum Output Power | 5 Watts |
| Audio Output Mode | Stereo (with TWS pairing) |
| Water Resistance Level | IPX7 |
| Item Weight | 3.84 ounces (0.11 Kilograms) |
| Product Dimensions | 1.6"D x 1.6"W x 1.8"H |
| Charging Time | 2 Hours |
| Battery Life | 7-10 hours (at medium volume) |
| Bluetooth Range | 10 Meters |
| Power Source | Battery Powered (1 Lithium Polymer battery included) |
| Control Method | Touch (Power button) |
10. Warranty and Support
10.1. Warranty Information
The comiso C17 Small Bluetooth Speaker comes with a worry-free 365-day warranty from the date of purchase. This warranty covers manufacturing defects and ensures the product functions as intended under normal use. It does not cover damage caused by misuse, accidents, unauthorized modifications, or natural disasters.
10.2. Customer Support
For any questions, technical assistance, or warranty claims, please contact our friendly customer service team. Refer to the contact information provided in your purchase documentation or visit the official comiso website for support details.





