Yealink YHS36-MONO is a professional headset with the over-the-head style that eliminates background noise and helps you get into your zone and focus. Coupled with wideband audio technology and HD voice, the YHS33 delivers richer and clearer conversations, as well as reduces listening difficulties. Bundle Includes: YHS36-MONO Headset and 2PK replacement Windscreen. Compatible with: Yealink T19P, T2, T3, T4 AND T5 Series via RJ9 connection