Retevis 2 Pin Acoustic Tube Headset Mic with PTT Walkie Talkie Headset Compatible with Kenwood Baofeng UV-5R 888S Retevis H-777 RT21 RT22 Arcshell AR-5 Walkie Talkies (5 Pack) 2 way radio earpiece with transparent and ergonomic design with soft ear buds fit snugly in ears well; the sound quality is fair Sensitive built In Mic with PTT allows you for no-nonsense hands-free calls; great for smooth communications with your partners for military;police;security;bouncer;warehouse; paintball; riding 2 pin standard diameter ear 2.5mm and 3.5mm stereo; space of two-pin 8mm for Baofeng Kenwood Retevis 2 way radios Stainless Steel Clip; you'll clip it to your collar to adjustment the volume close to your mouth and push to talk for hands free calls Simple and Convenient return process; 60 days warranty provide by us and 30 days no reason to return