Retevis Walkie Talkie Earpiece Boom Mic Overhead Headphone with VOX PTT Compatible Kenwood H-777 RT22 RT21 Baofeng UV5R BF-888S Two Way Radio (1 Pack) Noise cancelling headphones with boom Mic for most walike talkies; it could block out the noise to provide you clear loud sound Dual PTT and VOX switch on this earpiece can adjust the the earpiece to turn on or off VOX function to meet your needs The walkie talkie headphone headband is flexible and can be adjusted according to your head; Soft sponge earphone with 270rotatable microphone for fairly comfortablewearing Two way radio headset with strong durable PU cable for long term use Simple and convenience return process;we provided 60 days warranty and 30 days return