Product description:
■150ohms speaker, to ensure the perfect voice quality. Noise proof microphone, to increase the voice clarity.
■Comfortable wear, compact appearance, human engineering design, Can be uninterruptible using.The headset clip can be stretched freely and comfortable wear.
■Compatible for the most telephones in call center.
■Superior quality sound with the flexible adjustable noise cancellation microphone.
■Just plug directly and firmly into your headset-ready telephone! You just simply plug this modular plug into the headset jack on your phone and it's ready to be used.
Compatible with the following Phones: 
Cisco 7902, 7905, 7905G, 7906G, 7910, 7910+SW 7911, 7912 IP Phones 
Panasonic KX-T Series phones such as: KX-T2260, KX-T2310, KX-T2315, KX-T2365, KX-T2368, KX-T7220, KX-T7230, KX-T7330, KX-T7433, KX-T7625, KX-T7630, KX-T7633, KX-T7636, KX-T7665, KX-T7720, KX-T7730, KX-T7740 and KX-T7750 
Avaya 1608, 1616, 9620, 9630, 9640, 9640G and 9650 IP Phones 
Yealink SIP-T19P T20P, T21P, T22P, T26P, T28P, T32G, T41P, T38G, T42G, T46G, T48G
AltiGen IP805 
CortelcoFanvil C58, C58P C62, C66 
Grandstream GXP14XX, GXP1400 GXP1405 GXP1450 
GXP2124, GXP2120, GXP2140 GXP2140 GXP2160 GXP2110, GXP2100, GXP2020, GXP2010, GXP1200, GXP280, GXP285, GXV3005, GXV3006, GXV3240 GXV3275 IP Phones 
Huawei ET325,ET525 
Snom 300, 320,360,370,710, 720,760, 820, 821, 870
 
               
      