Comdio H103VG4 Mono Call Center Telephone Headset Headphone with Mic + Volume Mute Control for Grandstream IP Phones GXP1400 GXP1405 GXP1450 GXP2124 GXP2120 GXP2140 GXP2140 GXP2160 GXP2110 GXP2100 ONLY WORKS FOR SOME SPECIFIC PHONES. SEE COMPATIBLE PHONE LIST IN DESCRIPTION, BUY THE ITEM TODAY IF YOU HAVE ONE OF THE PHONE MODELS LISTED BELOW. Direct connect over the head headset headphone, No additional amplifiers or adapters required, Most easy setup headset solution. Superior quality sound with the flexible adjustable noise cancellation microphone. Super Lightweight, Super Durable Headset with Comfortable ear and mic cushions. Professional Mic Mute / Volume Control built in.