Retevis Two Way Radio Headset with Mic, Open Full Face Motorcycle Helmet, Finger PTT, for RT22 RT21 H777, Compatible with Pxton Baofeng BF-888S Kenwood Walkie Talkies, Walkie Talkie Earpiece(1 Pack)

K head plug 2 pin; former pin diameter of 3.5 mm and 2.5 mm in diameter after pin; compatible with Retevis RT22 RT21 H-777 RT68 RT19; compatible with BAOFENG UV-5R walkie talkies; etc ^^ Open/Full Face Motorcycle Helmet Headset; walkie talkie headset is designed for various styles of helmets; you can use it for motorcycling; dirt bike riding; snowmobiling; off road car; go-kart race; etc ^^ Two speakers with sticker; you can posted the speaker on a suitable place of the helmet tightly; which will offer you a smooth and clear communication experience while riding at any speed ^^ Finger PTT; the PTT button can be fixed on the finger or the handlebar for convenient and quick communication without having to look for it everywhere ^^ Coil design; the coil design allows the length of the cable to be adjusted to meet the needs of different groups of people