Retevis 2 Pin PTT Mic Covert Acoustic Tube Earpiece Headset for Kenwood PUXING Baofeng UV-5R UV-5RA 888S Retevis H777 RT7 RT21(1 Pack) 2 pin acoustic tube earpiece;former pin diameter of 3.5 mm and 2.5 mm in diameter after pin; double pin from 8 mm within and 11 mm center distance of 2 pin The transparent tube connecting the ear bud makes you look like a secret service agent or a body guard and protects your health from radio electromagnetic wave radiation The earpiece fits snugly in your ear easily which keeps your conversations private Excellent for use in police military nightclubs bars paintball security restaurants and noisy environments Simple and Convenient return process; 60 days warranty provide by us and 30 days no reason to return