The revolutionary AirLine, "plug-in" guitar transmitters come in two versions: the AF1 for Strat(R)-style inputs and the AG1 for traditional Gibson(R)-style end-mount inputs and all others. Less than half the size of conventional body packs, these miniaturized transmitters run on a tiny triple-A battery with 14-hour battery life. Both feature 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 for use with your compact effect pedals, the AP1 diversity receiver gives you reception you can always depend on. It features a 1/4" output jack, Power switch, Peak LED and a Volume control. You can use a 9 volt battery or an AC adapter to power the receiver. When you unplug the input to the unit, the battery is disabled to conserve power.