Review on 🎧 Retevis Walkie Talkie Earpiece Boom Mic: Overhead Headphone with VOX PTT Headset Microphone (1 Pack) by Ryan Yap

PTT works but in VOX mode it will transmit continuously until it switches back to PTT. This has also been noticed by other reviewers. In a quiet room, I tried the lowest VOX settings on the Baofeng UV5R, Kenwood TH-F6A and Tytera MD380. In any case, he transmits immediately. Another headset works fine for me. One reviewer said he bought two and one of them actually works as it should. I think you have a 50/50 chance VOX will work. :-/ The seat of the headset is uncomfortable.