Klein Electronics BluComm-PTT BluComm Bluetooth Wireless Push-To-Talk Button With Swivel Clip For Android And iOS Phones - Works with ESChat, Zello, GroupTalk, FirstNet, or any other PTT software For use with Android And iOS Phones Works with ESChat, Zello, GroupTalk, FirstNet, or any other PTT software Swivel clothing clip BluComm wall charger sold separately Compatible with Kyocera phones using EPTT, PTT+