Retevis 2 Pin Speaker Mic for Baofeng UV-5R Retevis H-777 RT21 RT22 RT27 Kenwood TYT HYT 2 Way Radio (1 Pack) Remote speaker microphone almost all work with Baofeng; Kenwood and Retevis Kevlar Reinforced Cable; durable PU coil cord allows you extremely get long term usage experience Remote Speaker with PTT Mic; Push to Talk button and remote mic allows you clip it to collar close to mouth to transmit clear for handfree conversations Compatible Size; Ear 3.5mm stereo (top pin); Mic 2.5mm stereo (bottom pin); Spaced Between Two Pin is 11mm Simple and Convenient return process; 60 days warranty provide by us and 30 days no reason to return