1.Compatible for Kenwood,BAODEENG,PUXING,WOUXUN, RELM,WEIERWEI radio walkie talkie earpiece headset 2 pin. 2.PTT MIC Function: Has a remote microphone with push to talk button. 3.Headset for baofeng radio,also suit for Two Way Radios kenwood TK-2107 TK-3107,Baofeng UV-5R UV-5RA 888S Kenwood Retevis H777 RT7 RT21 RT2 2 Way Radio and so on. 4.Baofeng Covert earpiece,covert acoustic tube transmits more clear sound. 5.Excellent for use in police, military,nightclubs,bars,paintball,security,restaurants,hotels,bouncer,warehouses,and noisy environments.