Retevis Volume Adjustment Controls Walkie Talkie Earpiece with Mic, Coil Tube, for RT22 RT68 RT21 H-777 H777H, Compatible with Pxton, Baofeng, Kenwood Two Way Radio, 2 Way Radio Earpiece(20 Pack)

Volume adjustment controls; the headset is equipped with a volume adjustment button; could adjust the sound volume according to actual needs ^^ C shape surveillance earpiece; fit snugly in ears without drops for long time comfortable wearing ^^ Sensitive built in mic with PTT; with PTT (push-to-talk) functionality allows you for no-nonsense hands-free calls; great for smooth communications with your partners ^^ Coil design; 200DKevlar arbitrary expansion and contraction; radio earpiece good durability supports your daily use ^^ K head 2 pin; multi-brand compatibility; the walkie talkie earpiece compatible with Retevis RT21/RT22//H777/H777H/RT68/RT68H/RT19/RT22S/H777S/H777D/RT27/RT21H/MateTalk B4/RT86S/RB58/RB26H/C6B walkie talkies; compatible with Pxton, Baofeng BF-888S/BF-T26, Kenwood walkie talkies