1. Introduction
Thank you for choosing the ICOMTOFIT M-ONE Bluetooth Headset. This wireless earpiece is designed for clear communication in various environments, featuring dual-mic noise canceling and Bluetooth V5.3 connectivity. This manual provides detailed instructions for setup, operation, and maintenance to ensure optimal performance.
2. Package Contents
Please verify that all items are present in your package:
- ICOMTOFIT M-ONE Bluetooth Headset
- Charging Case
- USB Dongle
- USB Type-C Charging Cable
- Ear Tips (S, M, L sizes, two of each)
- User Manual
3. Product Overview
Familiarize yourself with the components of your ICOMTOFIT M-ONE Bluetooth Headset.

Image 3.1: ICOMTOFIT M-ONE Bluetooth Headset, charging case, and USB dongle.
3.1 Headset Controls

Image 3.2: Headset controls including USB Type-C charging port, phone pairing button, play/pause, volume up/next song, volume down/previous song, and mute/Siri button.
- USB Type-C Charging Port: For charging the headset.
- Phone Pairing / Play / Pause Button: Multifunction button for pairing and media control.
- Volume+ / Next Song Button: Increases volume or skips to the next track.
- Volume- / Previous Song Button: Decreases volume or goes to the previous track.
- Mute / Siri Button: Mutes the microphone or activates the voice assistant.
4. Setup
4.1 Charging the Headset and Case
Before first use, fully charge the headset and charging case.
- Charge the Headset: Place the headset onto the charging port of the charging case. Ensure the charging contacts align until you hear a 'click'. The headset's red light will stay on, and the charging case's LED screen will show its remaining digital battery level. Note: The case's battery level is not the headset's.
- Charge the Case: Connect the USB Type-C charging cable to the charging case and a power source. The LED display on the case will indicate charging status.

Image 4.1: Correct charging method for the headset within its case. Ensure proper alignment of charging contacts.
For more details on charging, scan the QR code: Charging Information
4.2 Power On/Off
- Power On: Press and hold the multifunction button for 3 seconds until the indicator light flashes blue.
- Power Off: Press and hold the multifunction button for 5 seconds until the indicator light flashes red and then turns off.
4.3 Bluetooth Pairing (Mobile Phone)
Pair your headset with your mobile device for wireless communication.
- Ensure the headset is powered off.
- Press and hold the multifunction button for approximately 5-7 seconds until the indicator light flashes red and blue alternately, indicating pairing mode.
- On your mobile phone, enable Bluetooth and search for available devices.
- Select "M-ONE" from the list of devices.
- Once connected, the indicator light will flash blue slowly.

Image 4.2: The headset wirelessly connecting to a smartphone via Bluetooth.
4.4 USB Dongle Connection (PC/Laptop)
For devices without Bluetooth or for a more stable connection, use the provided USB dongle.
- Insert the USB dongle into an available USB port on your computer.
- Power on the M-ONE headset.
- The headset will automatically connect to the USB dongle. The indicator light will flash blue slowly once connected.

Image 4.3: The headset establishing a connection with a laptop using the USB dongle.
4.5 Multi-device Connection
The M-ONE headset supports simultaneous connection to two devices, allowing seamless switching.
- Connect the headset to the first device (e.g., your phone) as described in Section 4.3.
- Disconnect Bluetooth on the first device. The headset will re-enter pairing mode.
- Connect the headset to the second device (e.g., your laptop via USB dongle or Bluetooth) as described in Section 4.4 or 4.3.
- Reconnect Bluetooth on the first device. The headset will now be connected to both devices.
- The headset will automatically switch audio between the active device.
5. Operating Instructions
5.1 Wearing the Headset
For optimal comfort and sound quality, adjust the headset to fit your ear.
- The ear hook can be rotated 180 degrees to fit either your left or right ear.
- The microphone boom can also be rotated 180 degrees and adjusted for optimal voice pickup.
- Choose the appropriate ear tip size (S, M, L) for a secure and comfortable fit.

Image 5.1: The headset's ear hook and microphone boom can be rotated for comfortable wear on either ear.

Image 5.2: Select the ear tip size (S, M, L) that provides the best fit and comfort for your ear.
5.2 Call Management
- Answer Call: Press the multifunction button once.
- End Call: Press the multifunction button once during a call.
- Reject Call: Press and hold the multifunction button for 2 seconds.
- Mute/Unmute Microphone: Press the Mute button once during a call.
5.3 Audio Playback
- Play/Pause: Press the multifunction button once.
- Next Track: Press the Volume+ button once.
- Previous Track: Press the Volume- button once.
- Volume Up: Press and hold the Volume+ button.
- Volume Down: Press and hold the Volume- button.
5.4 Voice Assistant
- Activate Voice Assistant (Siri/Google Assistant): Long press the Mute button for 2 seconds.
6. Maintenance
Proper maintenance ensures the longevity of your headset.
- Cleaning: Use a soft, dry cloth to clean the headset and charging case. Avoid using harsh chemicals or abrasive materials.
- Storage: When not in use, store the headset in its charging case to protect it from dust and damage. Store in a cool, dry place.
- Battery Care: To preserve battery life, avoid fully discharging the battery frequently. Charge the headset regularly, even if not in constant use.
7. Troubleshooting
If you encounter issues with your headset, refer to the following common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Headset does not power on | Low battery | Charge the headset fully. |
| Cannot pair with device | Headset not in pairing mode; Bluetooth off on device | Ensure headset is in pairing mode (flashing red/blue). Enable Bluetooth on your device and search again. |
| No sound or poor sound quality | Volume too low; Headset out of range; Interference | Increase volume. Move closer to the connected device. Avoid strong electromagnetic interference. |
| Microphone not working | Microphone muted; Incorrect audio input selected | Unmute the microphone. Check your device's audio settings to ensure M-ONE is selected as the input device. |
| Headset disconnects frequently | Out of range; Low battery; Interference | Move closer to the connected device. Charge the headset. Avoid interference sources. |
8. Specifications
Technical details of the ICOMTOFIT M-ONE Bluetooth Headset.
| Feature | Detail |
|---|---|
| Model Name | M-ONE |
| Brand | ICOMTOFIT |
| Connectivity Technology | Wireless (Bluetooth V5.3) |
| Wireless Communication Technology | Bluetooth |
| Ear Placement | In Ear |
| Form Factor | In Ear |
| Control Type | Button Control |
| Compatible Devices | Cellphones |
| Recommended Uses | Calling, Business |
| Charging Time | 2 Hours |
| Frequency Range | 20 Hz to 20,000 Hz |
| Material | Plastic |
| Item Weight | 5.3 ounces |
| Batteries | 1 9V battery (included) |
9. Warranty and Support
ICOMTOFIT products are designed for reliability and performance. For warranty information, technical support, or further assistance, please visit the official ICOMTOFIT store or contact customer service.
Official ICOMTOFIT Store: ICOMTOFIT Store on Amazon