SHOKZ SHOKZ C120
SHOKZ OpenComm2 UC 2025 Upgrade User Manual
Model: SHOKZ C120
Introduction
This manual provides comprehensive instructions for the SHOKZ OpenComm2 UC 2025 Upgrade Open-Ear Wireless Computer Headset. It covers setup, operation, maintenance, and troubleshooting to ensure optimal performance and longevity of your device. Please read this manual thoroughly before using the headset.
What's in the Box
Verify that all items listed below are included in your package:
- OpenComm2 UC 2025 Upgrade Bone Conduction Stereo Bluetooth Headset
- Shokz Loop 120 USB-A Wireless Adapter
- USB-C Charging Cable
- Hard Shell Carrying Case

Figure 1: Package Contents. The image displays the OpenComm2 UC headset, the Shokz Loop 120 USB-A adapter, a USB-C charging cable, and a hard shell carrying case.
Product Overview
The OpenComm2 UC headset features an open-ear design for situational awareness and a boom microphone for clear communication.

Figure 2: SHOKZ OpenComm2 UC 2025 Upgrade Headset. This image shows the full headset with its flexible band and boom microphone, alongside the compact USB-A wireless adapter.
Key Features:
- Advanced All-Day Comfort: Lightweight (35g) with a flexible frame and IP55 water-resistant soft silicone finish.
- Crystal-Clear Calls: 7th generation Bone Conduction Technology, PremiumPitch 2.0 audio, and a noise-canceling microphone with DSP technology.
- Designed for Computer Compatibility: Shokz Loop120 wireless adapter for stable PC/Mac connection, Zoom-Certified.
- Intuitive Integrated Controls: Physical buttons for volume, mute, play/pause.
- Effortless USB-C Charging: Up to 16h talk time, 8h listening time; 5-minute quick charge provides 2h talk time.
Setup
1. Charging the Headset
Before first use, fully charge the headset. The headset uses a magnetic USB-C charging cable.
- Connect the USB-C end of the charging cable to a power source (e.g., computer USB port, wall adapter).
- Attach the magnetic end of the cable to the charging port on the headset. The headset will indicate charging status.

Figure 3: USB-C Charging. The image illustrates the headset connected to a USB-C charging cable, highlighting its simple charging process, improved battery life (16h talk, 8h listening), quick charge feature (5 min for 2h talk), and IP55 water resistance.
2. Connecting to a Computer (USB-A Dongle)
For a stable and uninterrupted connection with your PC or Mac, use the included Shokz Loop120 USB-A Wireless Adapter.
- Insert the Shokz Loop120 USB-A Wireless Adapter into an available USB-A port on your computer.
- Power on your OpenComm2 UC headset. The headset and adapter should automatically pair. A solid blue light on the adapter indicates a successful connection.

Figure 4: PC and Mac Compatibility. This image shows the Shokz Loop120 wireless adapter plugged into a laptop, emphasizing its stable connection for PC and Mac, and the headset's Zoom certification for seamless software integration.
3. MultiPoint Pairing (Bluetooth)
The headset supports MultiPoint Pairing, allowing connection to two devices simultaneously.
- Ensure the headset is powered off.
- Press and hold the Power/Volume+ button until the LED indicator flashes red and blue, indicating pairing mode.
- On your first device (e.g., smartphone), enable Bluetooth and select "OpenComm2 UC" from the list of available devices.
- Once connected, power off the headset.
- Repeat steps 2 and 3 to pair with your second device (e.g., tablet).
- Power off the headset, then power it on again. It will now be connected to both devices.

Figure 5: MultiPoint Pairing. The image shows the OpenComm2 UC headset positioned between a smartphone and a laptop, visually representing its ability to seamlessly pair with two devices and switch between them.
Operating Instructions
Headset Controls
The OpenComm2 UC features intuitive physical buttons for easy control:

Figure 6: User-Friendly Integrated Controls. This image provides detailed views of the headset's physical control buttons: the mute button on the boom mic, the Power/Volume+ button, and the multifunction button, illustrating their accessibility for quick actions.
| Button | Function | Action |
|---|---|---|
| Power/Volume+ | Power On/Off | Press and hold for 2 seconds |
| Power/Volume+ | Volume Up | Press once |
| Volume- | Volume Down | Press once |
| Multifunction Button | Play/Pause Audio | Press once |
| Multifunction Button | Answer/End Call | Press once |
| Multifunction Button | Next Track | Double-press |
| Multifunction Button | Previous Track | Triple-press |
| Mute Button (on boom mic) | Mute/Unmute Microphone | Press once |
Zoom Certification
The OpenComm2 UC headset is Zoom Certified, ensuring seamless integration and optimized performance with Zoom meetings. You can control various Zoom functions directly from the headset's buttons.

Figure 7: Zoom Certified. This image shows a professional using the headset during a video conference, emphasizing its Zoom certification for seamless software integration and control via headset buttons.
Maintenance
Cleaning
To maintain the headset's performance and hygiene, regularly clean it with a soft, damp cloth. Avoid using harsh chemicals or abrasive materials.
Water Resistance (IP55)
The OpenComm2 UC headset has an IP55 water-resistant rating, meaning it is protected against dust ingress and low-pressure water jets from any direction. This makes it suitable for use in environments where light splashes or sweat may occur. Do not submerge the headset in water.

Figure 8: IP55 Water-Resistant. The image shows the headset with water droplets, illustrating its IP55 rating which protects against splashes and light spills.
Troubleshooting
| Problem | Possible Solution |
|---|---|
| No Power | Ensure the headset is fully charged. Connect to the USB-C charging cable. |
| Cannot Pair with Device | Ensure the headset is in pairing mode (flashing red and blue LED). Check your device's Bluetooth settings. Try restarting both the headset and the device. |
| Poor Audio Quality | Ensure the headset is within Bluetooth range (up to 98 feet). Reduce interference from other wireless devices. Check the audio settings on your connected device. |
| Microphone Not Working | Ensure the microphone is not muted. Check microphone input settings on your computer or device. Position the boom mic closer to your mouth. |
| Headset Disconnects Frequently | Ensure the Shokz Loop120 USB-A Wireless Adapter is securely connected to your computer. Update headset firmware via the Shokz Connect app. |
Specifications
| Feature | Detail |
|---|---|
| Model Name | Open Comm2 UC 2025 Upgrade |
| Connectivity Technology | Wireless (Bluetooth 5.1) |
| Audio Driver Type | Bone Conduction Driver |
| Frequency Range | 20 Hz - 20,000 Hz |
| Item Weight | 35 Grams (1.23 ounces) |
| Battery Life (Talk Time) | Up to 16 Hours |
| Battery Life (Listening Time) | Up to 8 Hours |
| Charging Time | 1 Hour (5-minute quick charge for 2h talk time) |
| Water Resistance Level | IP55 Water Resistant |
| Bluetooth Range | 98 Feet |
| Compatible Devices | iPhone, PC, Watch, Mac, Android |
| Included Components | Headset, Hard Shell Carrying Case, USB-A Wireless Adapter, USB-C Charging Cable |
Warranty and Support
The SHOKZ OpenComm2 UC 2025 Upgrade comes with a 2-year warranty from the date of purchase. Please retain your proof of purchase for warranty claims.
For technical support, warranty service, or additional information, please visit the official SHOKZ website or contact their customer service. You can also refer to the official User Guide PDF available online for more detailed information:
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