Retevis RT21 Two Way Radio UHF 16 CH 2 Way Radio VOX Scrambler Walkie Talkies Rechargeable(1 Pair) with Covert Air Acoustic Earpiece(2 Pack) Intelligent charge control unit allow you can let it alone and enjoy your leisure time when charging Excellent Anti-interference can keep your private communication and enhance your communication safety Easy to operate;same channel can work directly easy for all of the age to use together Included 2 pack high-quality covert air acoustic earpiece so that no worry about the quality 1 year warranty and 30 days no reason to return; no matter any reason and within 30 days you can apply for a return including the radio accessories