| Product type | Personal audio conferencing system |
| Wearing style | Head-band |
| Recommended usage | Office/Call center |
| Product colour | Black |
| Headset type | Binaural |
| Operating keys | Answer/end call, Mute, Reject call, Volume +, Volume - |
| Control type | Buttons, Touch |
| LED indicators | Status |
| Certification | CE, FC, IC |
| Connectivity technology | Wireless |
| USB connector | USB Type-A |
| Bluetooth | Yes |
| Bluetooth version | 4.2 |
| Ear coupling | Supraaural |
| Headphone frequency | 20 - 20000 Hz |
| Impedance | 32 Ω |
| Driver unit | 2.8 cm |
| Microphone type | Boom |
| Microphone frequency | 100 - 10000 Hz |
| Microphone sensitivity | -44 dB |
| Number of microphones | 2 |
| Microphone mute | Yes |
| Base station colour | Black |
| Rechargeable battery | Yes |
| Talk time | 13 h |
| Battery recharge time | 2.5 h |
| Battery voltage | 12 V |
| Standby time | 90 h |
| Charging time | 2.5 h |
| Wireless charging | Yes |
| Weight | 478 g |
| Package type | Box |
| Charging stand | Yes |
| AC adapter included | Yes |
| Quick start guide | Yes |
| Cables included | USB |
| Base station | Yes |
| Harmonized System (HS) code | 85183000 |
| Charging time | 170 min |
| USB cable length | 1 m |
| Sensitivity | 97 dB |
| Description |
| Yealink WH66 DECT Wireless Headset MONO UC. Product type: Personal audio conferencing system. Connectivity technology: Wireless, Bluetooth. Recommended usage: Office/Call center. Headphone frequency: 20 - 20000 Hz. Weight: 478 g. Product colour: Black |