The Yealink WH66 is a wireless DECT VoIP headset (single) designed for professional VoIP telephony and unified communications. It uses a DECT base station for secure wireless connection with IP phones and softphones (UC variant). It features an noise-canceling microphone for clear voice reception, an adjustable headband with a comfortable ear cushion, and an extended talk time per charge. It is suitable for offices and contact centers that require mobility and high voice quality.