Cleyver ODHW25
CLEYVER HW25 Duo Wireless DECT Headset User Manual
Model: ODHW25
1. Introduction
Thank you for choosing the CLEYVER HW25 Duo Wireless DECT Headset. This manual provides detailed instructions for the setup, operation, and maintenance of your new headset. Designed for daily and intensive use, the HW25 Duo offers comfort, clear communication, and extended wireless range. Please read this manual thoroughly to ensure optimal performance and longevity of your device.
2. Package Contents
Please verify that all items listed below are present in your package:
- CLEYVER HW25 Duo Wireless Headset
- Charging Base
- Power Adapter
- Connection Cable (RJ)
- User Manual (this document)

Image 2.1: CLEYVER HW25 Duo Headset and Charging Base. The headset is black with an adjustable headband and a microphone boom, resting on its black charging base.
3. Product Overview
The CLEYVER HW25 Duo consists of a wireless headset and a charging base. Familiarize yourself with the components for proper use.
3.1. Headset Components
- Adjustable Headband: For comfortable fit.
- Ear Cushions: Soft padding for extended wear.
- Microphone Boom: Flexible arm with noise-cancelling microphone.
- Volume Controls: Buttons on the earcup for adjusting audio levels.
- Mute Button: To silence the microphone.
- Call Control Button: For answering and ending calls.
- Busy Light: Integrated indicator to show call status.
3.2. Charging Base Components
- Charging Cradle: Where the headset rests for charging.
- Status Indicators: LEDs for power, charging, and connection status.
- RJ Port: For connecting to a DECT telephone.
- Power Port: For connecting the power adapter.

Image 3.1: A man wearing the CLEYVER HW25 Duo headset, demonstrating its use in an office environment. The headset features an over-ear design with a microphone boom positioned near the mouth.

Image 3.2: A woman wearing the CLEYVER HW25 Duo headset, highlighting its comfortable fit and professional appearance.
4. Setup Guide
4.1. Connecting the Charging Base
- Connect the power adapter to the power port on the charging base.
- Plug the power adapter into an electrical outlet. The power indicator on the base will illuminate.
- Connect the RJ cable from the charging base to the headset port on your compatible DECT telephone.
4.2. Initial Headset Charging
Before first use, fully charge the headset.
- Place the CLEYVER HW25 Duo headset onto the charging cradle of the base. Ensure it is seated correctly.
- The charging indicator on the base will show the charging status. A full charge takes approximately 3 hours.
- Once fully charged, the headset is ready for use.

Image 4.1: The CLEYVER HW25 Duo headset docked in its charging base, positioned on an office desk next to a keyboard and monitor.
5. Operating Instructions
5.1. Powering On/Off
- To power on the headset, press and hold the Call Control button until the indicator light flashes.
- To power off, press and hold the Call Control button until the indicator light turns off.
5.2. Making and Receiving Calls
- Answering a Call: Press the Call Control button on the headset.
- Ending a Call: Press the Call Control button again.
- Making a Call: Dial the number on your DECT phone. The call will automatically transfer to the headset once connected.
5.3. Volume Control
Use the volume up (+) and volume down (-) buttons on the headset earcup to adjust the listening volume.
5.4. Muting the Microphone
Press the Mute button on the headset to temporarily disable the microphone. Press it again to unmute.
5.5. Noise-Cancelling Microphone
The integrated noise-cancelling microphone reduces background noise, ensuring clear conversations for the person on the other end. Position the microphone boom approximately two fingers' width from your mouth for optimal performance.
5.6. Busy Light
The Busy Light on the headset indicates when you are on a call, signaling to others that you are occupied.
5.7. Wireless Range
The CLEYVER HW25 Duo offers a wireless range of up to 150 meters from the charging base, allowing for mobility during calls. Environmental factors may affect actual range.
6. Maintenance and Care
- Cleaning: Use a soft, dry cloth to clean the headset and charging base. Avoid using harsh chemicals or abrasive materials.
- Storage: When not in use, store the headset on its charging base to keep it charged and protected.
- Temperature: Avoid exposing the device to extreme temperatures, direct sunlight, or high humidity.
- Battery Care: To prolong battery life, avoid fully discharging the headset frequently. Charge it regularly.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No audio from headset | Headset not powered on; low battery; not properly connected to phone. | Ensure headset is powered on and charged. Check all cable connections to the DECT phone. |
| Microphone not working | Microphone muted; microphone boom not positioned correctly. | Press the Mute button to unmute. Adjust the microphone boom closer to your mouth. |
| Poor sound quality / Static | Out of range; interference; low battery. | Move closer to the charging base. Ensure no other DECT devices are causing interference. Charge the headset. |
| Headset not charging | Headset not seated correctly; power adapter not connected. | Ensure the headset is properly placed in the charging cradle. Check power adapter connection to the base and outlet. |
8. Technical Specifications
| Feature | Detail |
|---|---|
| Model Number | ODHW25 |
| Brand | Cleyver |
| Connectivity Technology | Wireless (DECT) |
| Recommended Use | DECT Phone, Cordless Phone |
| Compatible Devices | Telephone |
| Special Features | Noise Cancellation, Fast Charging, Noise Isolation, Integrated Microphone |
| Wireless Range | Up to 150 meters |
| Frequency Range | 20 Hz - 20,000 Hz |
| Control Type | Volume Control, Remote Control |
| Charging Time | Approximately 3 hours for full charge |
| Water Resistance Level | Not waterproof |
| Material | Plastic |
| Included Components | Power supply, Base, Cable, User Manual |
9. Warranty and Support
The CLEYVER HW25 Duo headset comes with a 2-year warranty from the date of purchase. This warranty covers manufacturing defects and material faults under normal use. It does not cover damage caused by misuse, accidents, unauthorized modifications, or normal wear and tear.
For technical support, warranty claims, or further assistance, please contact your retailer or visit the official Cleyver website for contact information. Please have your proof of purchase and model number (ODHW25) ready when contacting support.
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