MKJ branded headset features with wideband audio to deliver the highest level of audio performance even in super noisy environments.Its durable construction withstands the constant demands of all-day use in contact centers, busy offices, telemarketing companies etc.This office headset delivers unprecedented style and performance to office and call center professionals.With noise cancelling microphone for clearer voice transmission Phone Compatibility (Included but not Limited) Yealink: SIP-T19P,SIP-T20P,SIP-T21P, SIPT22P, SIP-T23P, SIP-T23G, SIPT26P, SIP-T27P, SIP-T28P, SIPT29G, SIP-T32G, SIP-T38G, SIPT41P, SIP-T42G, SIP-T46G, SIPT48G, SIP-T21PE2, SIP-19PE2 Grandstream: GXP-1200, GXP1400, GXP1405, GXP-2010, GXP-2020, GXP-2100, GXP-2110, GXP-2120, GXP-2124, GXP-2130, GXP-2135, GXP-2140, GXP-2160, GXP-2170, GXP-2200, GXP-280, GXP-285, GXV-3240, GXV-3275 Snom: 320, 360, 370, 710, 720, 760, 820, 821 and 870 Panasonic: KX-HDV130, KX-HDV230, KXHDV330 Sangoma: S205, S305, S400, S405, S500, S705