... and play intelligent connection When USB NANO transmitter connect to the USB port of PC/ ... Laptop , NANO USB transmitter direct decoding ,no need to install a ... , achieve high standards of listening comfortable. Specifications : Wireless Carrier Frequency : 2400MHz-2483.5MHzRated current and voltage ... : USB 2.0 Package Contents :Wireless headset, USB transmitter,Charging cable, User’s guide