The Airline UHF Bass Guitar System eliminates body packs with a tiny micro transmitter that plugs right into the bass guitar. The AP1B, the system's receiver, is designed to easily integrate into an effect pedal setup and features a shape circuitry yielding a fat bottom end and fullness never before heard in a wireless system for bass. It features an array of on-board controls: A Power On/Off and Mute switch, red/green LED for Power On/Off, a Peak LED and an Input Level control for different pickups. And UHF (Ultra High Frequency) means clearer frequencies with less interference. Designed and shaped like a stomp box, it ois easily intigrated with your compact effect pedals