| Product Type | DECT Wireless Headset |
| Model | WH66 MONO UC |
| Form Factor | On-Ear, Monaural (Single Ear) Over-the-Head |
| Sound Output Mode | Mono |
| Weight | 80 g |
| Power Requirements | Powered via base station with supported power adapter |
YEALINK WH66 Mono UC DECT Wireless Headset

Key Benefits
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AI-Powered Summaries from Online Customer Reviews
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- Ideal for hybrid and remote work needing reliable long-range wireless communication
- Touchscreen base with built-in speakerphone and USB hub increases workplace productivity
- Professional-grade audio and comfort features support all-day use in intensive UC environments
Product Overview
Unified Communications Premier DECT Wireless Headset DECT Headset: Monaural Ear (single ear) over-the-head Headset Busylight on headset Leather Ear Cushions Yealink Acoustic Shield Technology DECT Base: UC Button Input ports: 1x USB 3.0 Port, 2x Bluetooth 4 inch touch Screen Speakerphone 2-ports USB Hub Power Adpater Support Yealink Wireless Charger WHC60(Optional) 2.5mm jack for Busylight BLT60(Optional)Specifications
Product Overview
Wireless Features
| Wireless Technology | DECT |
| Max Operating Distance | 160 meters (525 feet) |
| Frequency Range (Headphone) | 20 Hz – 20 kHz |
| Frequency Range (Microphone) | 100 Hz – 10 kHz |
| Headset Busylight | Built-in LED indicator |
| Optional Busylight | BLT60 (external via 2.5mm jack) |
Compliance & Origin
| Country of Origin | China |
| Certifications | CE, FCC, RoHS |
Advanced Security Features
| DECT Security | DECT Secure Level C Encryption |
| Acoustic Shield Technology | Yes, dual-microphone noise filtering |
| Call Privacy | Secure pairing with base, encrypted communication |
Interfaces
| USB Ports | 2 x USB 3.0 ports on base |
| Audio Interface | 2.5 mm jack for Busylight (optional BLT60) |
| USB Connectivity | Yes (via base unit to PC) |
| Bluetooth | Yes (via base unit) |
| Bluetooth Version | Bluetooth 4.2 |
| Touchscreen | 4-inch capacitive touchscreen on base |
| Speakerphone | Integrated full-duplex speakerphone in base |
Physical & Environmental
| Base Station Dimensions | 120 mm x 120 mm x 103 mm |
| Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Storage Temperature | -40°C to +70°C (-40°F to 158°F) |
| Relative Humidity (Operating) | 10% – 95% (non-condensing) |
| Ear Cushion Material | Leather |
| Cable Length | 1 meter (charging cable) |
Cloud Management & Licensing
| Management Interface | Yealink USB Connect / Yealink Device Management Platform |
| Cloud Service Compatibility | Microsoft Teams, Zoom, UC platforms |
| Licensing Requirements | None for base use; optional Teams version available |