Review on Bietrun Microphone System: Ultimate UHF 165ft Range for iPhone, DSLR, PA Speaker, YouTube Recording by Christina Stanley

Press the volume up and down buttons at the same time to change the frequency. That's the only hard issue, apart from this microphone system being self-explanatory and very easy to use. The sound quality is good, I don't see any difference with my PurplePanda microphone. The system comes with 3 different microphones, which is very convenient. I wish they would also provide a case or something to make the system more portable. The receiver is bigger than I would like, but it's fast and needs to be charged separately with a micro USB cable. I moved the transmitter to another room, the receiver picks up the sound with no problems. It should also be noted that this microphone system does not work with mobile phones, I have tested it on both IOS and Android, it does not work on either of them. But I knew that when I bought it, so it's not surprising.