1. Introduction
Thank you for choosing the MIXX StreamQ C4 Wireless Noise Cancelling Headphones. These headphones are designed to provide an immersive audio experience with Active Noise Cancelling (ANC) technology, extended battery life, and a comfortable, foldable design. This manual will guide you through the setup, operation, and maintenance of your new headphones.
What's in the Box:
- MIXX StreamQ C4 Headphones
- USB Charging Cable
- Auxiliary Cable
- Carrying Bag (if included with your specific package)
2. Product Overview
Familiarize yourself with the various components and controls of your MIXX StreamQ C4 headphones.

Figure 2.1: Headphone Controls and Ports. This image highlights the USB-C charging port, the 3.5mm AUX port, and the integrated control buttons for volume and track navigation located on the earcup.

Figure 2.2: Labeled Diagram of Headphone Features. This diagram points out key features such as the adjustable headband, contoured control buttons, USB-C charging port, AUX port, and the location of the built-in microphone for hands-free calls.
Key Features:
- Active Noise Cancelling (ANC): Immerse yourself in audio by blocking out external distractions.
- Transparent Mode: Hear your surroundings when needed, enhancing safety in busy environments.
- Extended Battery Life: Up to 40 hours of playtime on a single charge.
- Quick Charge: 15 minutes of charging provides up to 8 hours of playtime.
- Integrated Controls: Easy management of calls, music, and voice assistants (Google & Siri).
- Comfortable & Foldable Design: Adjustable memory foam earpads and a compact, travel-ready design.
3. Setup
3.1 Charging Your Headphones
Before first use, fully charge your MIXX StreamQ C4 headphones. Use the provided USB charging cable to connect the headphones to a compatible USB power source (e.g., computer USB port, wall adapter).
- Full Charge Time: Approximately 3 hours.
- Quick Charge: A 15-minute charge provides up to 8 hours of playtime.

Figure 3.1: Quick Charge Feature. This graphic illustrates the rapid charging capability, providing significant playtime from a short charge.
3.2 Bluetooth Pairing
To connect your headphones wirelessly to a device:
- Ensure the headphones are charged and powered off.
- Press and hold the Power button (usually the multi-function button) until the LED indicator flashes, indicating pairing mode.
- On your device (smartphone, tablet, laptop), go to Bluetooth settings and enable Bluetooth.
- Search for available devices and select "MIXX StreamQ C4" from the list.
- Once connected, the LED indicator on the headphones will change (e.g., solid blue or stop flashing).
The headphones will automatically attempt to reconnect to the last paired device when powered on.
4. Operating Instructions
4.1 Power On/Off
- Power On: Press and hold the Power button for approximately 3 seconds until the LED indicator lights up.
- Power Off: Press and hold the Power button for approximately 5 seconds until the LED indicator turns off.
4.2 Music Playback Controls
Use the integrated buttons on the earcup to control your music:
- Play/Pause: Press the Multi-function button once.
- Next Track: Press and hold the Volume Up button.
- Previous Track: Press and hold the Volume Down button.
- Volume Up: Short press the Volume Up button.
- Volume Down: Short press the Volume Down button.
4.3 Call Management
The MIXX StreamQ C4 headphones feature a built-in microphone for hands-free calling.
- Answer/End Call: Press the Multi-function button once.
- Reject Call: Press and hold the Multi-function button for 2 seconds.
- Activate Voice Assistant (Siri/Google Assistant): Double-press the Multi-function button.
4.4 Noise Control Modes
Switch between Active Noise Cancelling (ANC) and Transparent Mode:
- ANC On/Off: Press the ANC button (typically a dedicated button or a specific combination, refer to device markings). When ANC is active, external noise is significantly reduced.
- Transparent Mode: Press the ANC button again to cycle to Transparent Mode. This mode allows ambient sounds to pass through, keeping you aware of your surroundings.
4.5 Wired Connection (AUX)
You can use the provided auxiliary cable to connect your headphones to devices without Bluetooth capability or when the battery is depleted.
- Plug one end of the 3.5mm auxiliary cable into the AUX port on the headphones.
- Plug the other end into the audio output jack of your device.
- Note: ANC functionality may still be available in wired mode, but controls might be limited to the connected device.
5. Maintenance
Proper care will extend the life of your MIXX StreamQ C4 headphones.
- Cleaning: Use a soft, dry cloth to wipe the headphones. Do not use abrasive cleaners or solvents.
- Storage: When not in use, store the headphones in the provided carrying bag. The foldable design allows for compact storage.
- Avoid Moisture: These headphones are not water-resistant. Keep them away from liquids and high humidity.
- Temperature: Avoid exposing the headphones to extreme temperatures.

Figure 5.1: Foldable Design for Easy Storage. This image demonstrates how the headphones can be folded for convenient portability and storage.
6. Troubleshooting
If you encounter issues with your headphones, try the following solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Headphones won't power on. | Low battery. | Charge the headphones fully. |
| Cannot pair with device. | Headphones not in pairing mode; Bluetooth off on device; too many paired devices. | Ensure headphones are in pairing mode; enable Bluetooth on device; clear old Bluetooth connections on your device. |
| No sound. | Volume too low; incorrect audio source; headphones not connected. | Increase volume on headphones and device; ensure correct audio output is selected; re-pair headphones. |
| ANC not working effectively. | ANC not activated; improper fit. | Ensure ANC mode is enabled; adjust headphones for a snug fit over your ears. |
7. Specifications
| Feature | Detail |
|---|---|
| Model Name | StreamQ C4 |
| Connectivity Technology | Wireless (Bluetooth 5.0) |
| Noise Control | Active Noise Cancellation |
| Battery Life | Up to 40 hours |
| Charging Time | Approx. 3 hours (15 min for 8 hours playtime) |
| Control Type | Touch Control / Integrated Buttons |
| Included Components | Headphones, USB Charging Cable, Auxiliary Cable |
| Item Weight | 13.9 ounces (approx. 394 grams) |
| Dimensions | 8.27 x 5.91 x 3.54 inches (Package Dimensions) |
| Manufacturer | MIXX |
| Color | Sand |
| Ear Placement | Over Ear |
| Impedance | 32 Ohm |
| Frequency Range | 20 Hz - 20,000 Hz |
8. Warranty and Support
For warranty information and customer support, please refer to the documentation included with your purchase or visit the official MIXX website. You can also visit the MIXX Store on Amazon for more details and contact options.
Manufacturer: MIXX
Model Number: USC4-BK-BK-022
UPC: 810148210236





