UHF guitar microphone system, designed to plug into electric guitars or any instrument with a mono jack output; it can also be used for sending an audio source wirelessly over a 30m distance. Just connect to a mono mixer output and send to powered speakers for example. There are 16 selectable channels. Powered by AA and AAA batteries and has a volume control on the receiver as well as a 15db cut on the transmitter. The unit uses ACT (Automatic channel targeting) which automatically uploads the frequency to the transmitter. Carrier Frequency: 863-865 Mhz, Weight: 240 g.