Yealink Phone Headsets For Office Phones Yhs34 Lite Qd To, Mono/72G/2.1M Cable COMPATIBILITY ?Yealink Desk Phones Series - T2x, T3x, T4xP/G/S/U, T5x, VP59, Teams MP/T5x, SFB MP/T5x ?Poly - VVX x01, VVX x10, VVX x50 ?SNOM - D385, D735, D765 ?Grandstream - GXP2135, GRP2613, GRP2604P, GXV3370 (*Please check Yealink Headset Compatibility List- h/t/t/p/s://support.yealink.com/en/portal/compatible) Runs Right Out of the Box | A QD (Quick Disconnect) to RJ9 plug-and-play makes the connectivity to Yealink IP phones at ease. The phones can automatically optimize acoustic parameters for YHS office headsets, gives you optimized audio quality. Ultra Lightweight Design | YHS34 Lite telephone headset is built for comfort with soft ear cushions and ultra-lightweight materials, the headset is 10%~30% lighter than other professional headsets in the same range. High-Quality Audio Experience | Made for calls, YHS34 RJ9 is kitted out with a high signal-to-noise ratio speaker and independent cavity design. The passive noise cancellation creates a richer and clearer conversation with reduced background noise. All Day Comfort | Designed with replaceable foamy ear cushions, the business headset can softly cover the ear and support long conference calls, the extremely lightweight design enables the phone headset all-day wearing comfortable without pressure.