Retevis H-777 Walkie Talkies Mic 2 Pin Shoulder Speaker Mic for Retevis RT22 RT21 RT19 H-777S RT15 RT68 RT27 RT21V RB26 RT18 RT1 RT28 RT-5R RT85 RT76 Arcshell AR-5 UV-5R BF-888S 2 Way Radios (1 Pack)

* 3.5mm earphone (audio) jack; 3.5mm listen only earpiece for the ultimate accessory solution; and it’s pretty necessary when you don’t like to other people listen to your partners private communication in noise environment * Built inmicrophone and remote speaker with clip; you could clip it to your backpack straps at our shoulder to transmit clear sound * Durable side ptt; you can push to talk easily with the sensitive big ptt button * Transmit LED; super convenient for operate the mic to transmit sound for communicating with your partner when color changes * Compatible with Retevis H-777 RT21 RT22 RT-5R RT17 RT18 RT19 RT27 UV-5R series BF-F8HP BF-888S Arcshell AR-5 Kenwood two way radio and more