Retevis 2 Pin 2 Way Radio Headset Covert Acoustic Tube Earpiece Mic PTT Compatible Kenwood Baofeng UV-5R BF-888S TYT Retevis H-777 RT7 RT27 RT22 H-777S Walkie Talkies (1 Pack) The built in remote mic allows you clip to your collar or anywhere close to your mouth to transmit clear crystal sound Big size PTT allow you push to talk for handsfree conversation freely even wearing gloves Length of the cable of Plug to PTT is 39.4in; Length of the cable of Plug to Speaker is 39.4in 2 pin standard diameter ear 3.5mm stereo of top pin; mic 2.5mm stereo of bottom pin Simple and Convenient return process; 60 days warranty provide by us and 30 days no reason to return