MadBoy AIRBOX 20P is a high quality wireless bodypack transmitter with 42 selectable channels.
You can use it wirelessly for instruments or different kinds of microphones.
AIRBOX 20P is made to be used with MadBoy U-TUBE serial wireless microphone sets but you can use it with other brand mics too.
Just check that that frequency will match.
Transmitter works with only two AA batteries, which is less expensive than other 9V battery powered transmitters.