Compatible with the following Phones: Cisco 7902, 7905, 7905G, 7906G, 7910, 7910+SW 7911, 7912 IP PhonesPanasonic 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-T7750Avaya 1608, 1616, 9620, 9630, 9640, 9640G and 9650 IP PhonesYealink SIP-T19P T20P, T21P, T22P, T26P, T28P, T32G, T41P, T38G, T42G, T46G, T48GAltiGen IP805CortelcoFanvil C58, C58P C62, C66Grandstream GXP14XX, GXP1400 GXP1405 GXP1450GXP2124, GXP2120, GXP2140 GXP2140 GXP2160 GXP2110, GXP2100, GXP2020, GXP2010, GXP1200, GXP280, GXP285, GXV3005, GXV3006, GXV3240 GXV3275 IP PhonesHuawei ET325,ET525Snom 300, 320,360,370,710, 720,760, 820, 821, 870 Keep your hands off the phone using this headset. You can increase productivity by working on your computer, taking notes, and handling other tasks - hands-free - while talking to your customers. Details: 150ohms speaker, to ensure the perfect voice qualityCompatible for the most telephones in call centerApplication for Phone sales, Telephone Counseling Services, Insurance, Hospitals, Banks, Telecom operators, Enterprises.Microphone type: electret condenser microphone(ECM)Microphone sensitivity: 40db±3dbMicrophone voltage: 2.0vReceiver impedance: 150±10 ohmPackage Include:1* 4-Pin RJ9 Crystal Binaural Headset NOTE: It is only a 4-Pin RJ9 Crystal Headset, not USB headset & not 2.5mm headset & not 3.5mm, so it can NOT work with computer directly Enjoy the benefits of completing calls faster and with less likelihood of errors. This headset model provides a substantial increase in comfort and productivity over a handset. The most cost-effective headset solution. You deserve it! Similar Items RJ9 Binaural Headset Add to Cart RJ9 Monaural Headset Add to Cart Headset with Dial Pad Add to Cart Headset with Dial Pad Add to Cart Headset with Dial Pad Add to Cart 2.5mm Monaural Headset Buying Options USB Monaural Headset Add to Cart Customer Reviews 3.9 out of 5 stars 3,349 3.8 out of 5 stars 1,385 4.2 out of 5 stars 2,311 4.2 out of 5 stars 463 4.2 out of 5 stars 3,396 3.8 out of 5 stars 363 4.0 out of 5 stars 470 Price $19.99$19.99 $16.99$16.99 $28.99$28.99 $29.99$29.99 $28.99$28.99 — $18.99$18.99 Port RJ9 Jack RJ9 Jack RJ9 Jack RJ9 Jack RJ9 Jack 2.5mm USB With Landline Phone No No √ √ √ No No Binaural √ No No √ No No No Monaural No √ √ No √ √ √ Style Corded Corded Corded Corded Corded Corded Corded