Retevis 2 Pin Walkie Talkie Earpiece with Mic for Kenwood Baofeng BF-UV5R Retevis H-777 RT22 RT21 Walkie Talkies (10 Pack) Length of the cable (Plug to PTT) 100cm;Length of the cable (PTT to Speaker)108cm Two-pin standard diameter ear 3.5mm stereo (top pin);Mic 2.5mm stereo (bottom pin);Space of two-pin 11mm The transparent tube connecting the ear bud makes you look like a secret service agent or a body guard and protects you from radiation Soft plastic earbud fits comfortably in your ear with a transparent acoustic tube which keeps your conversations private Simple and Convenient return process; 60 days warranty provide by us and 30 days no reason to return