The Digitech RP500 is a guitar effect pedal that comes with an internal power supply. This Digitech guitar pedal features an effect switching system, which lets you control internal stompboxes and effects. The pedal board mode turns the Digitech RP500 into five separate stompboxes. This guitar effect pedal has a 20-second looper and gives you up to 5 seconds of delay time. This Digitech guitar pedal provides you with 100 different factory presets and 100 adjustable user presets to choose from. The easy-to-read LED on the Digitech RP500 indicates program status as well as the names of the presets.