Grandstream Compatible Plantronics Wireless Headset Bundle (Electronic Remote Answering - EHS included for Grandstream IP Phones - Grandstream Phones: GXP1610, GXP1620, GXP1625, GXP1625, GXP1628GXP2130, GXP2140, GXP2160, GXV3240, GXV3275 . Unlike the mechanical Remote Lifter (HL10) included with other Plantronics Wireless Headsets this one is electronic so you never have to worry about anything breaking down. The included EHS Interface Cable allows you to easily roam and by notified around the office without missing any calls. When you get a call, a ringtone in the headset will notify you of an incoming call. All you need to do is push a button, on the headset, to answer. Never miss another important call again. Note: Grandstream Phones require firmware 1.0.4.23 or higher. To enable the wireless headset on your Grandstream phone perform the following steps. Select the APD-80 EHS by going to Menu, select Config, select Headset Type, then select Plantronics EHS.