Yealink UH34SE-M-UC Wideband Noise Cancelling Headset, USB and 3.5mm, Leather Ear Piece, YHC20 Controller with UC Button, Mono The UH34 Mono 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. The UH34 Mono has a soft leather earpiece. Simple and Flexible Connectivity Runs right out of box - USB plug-and-play setup makes the connectivity to the PC quick and easy. You can enjoy a reliable call experience with soft clients. A perfect match with Yealink IP phones, this headset gives you optimised audio quality. Unparallel Audio Experience Made for calls and music, the UH34 is kitted out with a high signal-to-noise ratio speaker and independent cavity design. The passive noise cancellation creates a richer and clearer conversations with reduced background noise. Intuitive Controller The hand-held controller with LED indicator provides easier access to key call control capabilities, including answer call, end call, reject call, and mute/unmute.