Yealink YHS34/YHS34 Lite is the over-the-head style headset which is made for office worker, SOHO, or call center staff. It supports QD (Quick Disconnect) feature and it is compliant with the full range of Yealink enterprise IP phones. The Yealink YHS34/YHS34 Lite, available in monaural (YHS34/YHS34 Lite Mono) and binaural (YHS34/YHS34 Lite Dual), is a professional analog wired headset with crystal clear audio. The YHS34/YHS34 Lite offers a lightweight form factor that is comfortable to wear, even for an entire workday. It?s suitable for workers who spend a lot of time wearing headsets for voice communications. YHS34 Lite: Foamy ear cushions