Phone Headsets RJ9 Compatible with Grandstream Yealink Snom Phones Microphone Noise Cancelling HD Voice Headphone with U10P-S & 3.5 mm Adapter Cable Professional HD voice phone headset 827035QD with specific quick disconnect RJ9 U10P-S reversed adapter cable compatible with Grandstream Yealink Snom IP telephones and a 3.5mm headphone jack (CTIA standard) cable. It has a clear sound wide band audio and good noise cancelling microphone. Light weight, comfortable, endurable and ergonomic design for professional users. Hearing protection comfort wearing flexible microphone boom arm perfect solution for call center, office users. Ergonomic curved movable headband for comfort wearing with smooth click for stop. Flexible microphone boom arm with 330 degree rotation of selective wearing for left or right ear. The quality leather ear cushion is easily replaced. The headsets with quick disconnect QD enabling users to walk away from telephone without taking headset off, more convenient on wearing. Headset Adapter Included: RJ9 U10P-S reversed adapter cable and 3.5mm Jack (CTIA standard) Smartphone Cable Adjustable headband fit any head size Ergonomic professional design, adjustable headband fit any head size. Adjust the headband until comfortable, gently pull the headband to slide it smoothly in or out of the support piece. Rotatable microphone boom 330 degree Lightweight Comfortable Durable, strong microphone boom 330 degree rotation enable you to find perfect position what you want. High quality leather ear cushion Soft high quality leather ear cushion make you comfortable for all-day. Keep you in a good mood and better service all round. Enhanced noise-cancelling microphone Enhanced noise-cancelling microphone technology to reduce background noise. Provide max frequency response resulting in greater call clarity productivity and better service all round. COMPATIBILITY GUIDE Grandstream GXP1200, GXP1400, GXP1405, GXP1610, GXP1615, GXP1620, GXP1625, GXP1628, GXP1630, GXP1760, GXP1780, GXP1782, GXP2010 GXP2020 GXP2100 GXP2110 GXP2120 GXP2124, GXP2130, GXP2135, GXP2140, GXP2160, GXP2170, GXP2200, GXP280, GXP285, GXV3240, GXV3275, GXV3140 GXV3175Yealink SIP T19P, T20P, T21P, T22P, T23P, T23G, T26P, T27P, T28P, T29G, T32G T38G, T40P, T40G, T41S, T41P, T42G, T42S, T46G, T46S, T48G, T48S, T49G, T52S, T54S, T56A, T58A, T58V PhonesSnom 320, 360, 370, 710, 720, 760, 820, 821, 870, D315, D345, D375, D712, D715, D725, D745, D765, UC600 If you find your phone model not here and unsure compatibility, please click to the seller iAmoy on the product page for one to one service.