Yealink YHS34-MONO Lite, Entry-level RJ9 headset, Monaural, Foam. Yealink YHS34 Lite is an over-the-head style headset for office workers, SOHO, or call centre staff. It supports QD (Quick Disconnect) and it is compliant with the full range of Yealink enterprise IP phones. The Yealink YHS34 Lite headset is a professional analogue wired headset with crystal clear audio. The YHS34 Lite offers a lightweight form factor that is comfortable to wear, even for an entire workday. It is suitable for workers who spend a lot of time wearing headsets for voice communications. Perfectly compatible with Yealink IP phones Runs right out of box, a QD to RJ9 plug-and-play setup makes the connectivity to Yealink IP phones. The phones can automatically optimise acoustic parameters for your YHS34 Lite. The perfect match with Yealink desktop phones give you optimised audio quality.