Stereo wireless headset | Audio

1. Wireless stereo headset 2. Stereo radio 3. Stereo wired headset Power supply: polymer lithium battery mhA  parameter:USB transmitterTransmitter frequency: 88.1MHZLaunch distance: 30 metersPower supply: USB 5VReceiving earphoneReceiving frequency: 87.5-108MHZReceiving...