IK Multimedia iRig Stomp, stompbox guitar interface for iPhone/iPod touch/iPad, Compact, durable yet lightweight, aluminum-cast enclosure integrates easily into any traditional pedalboard. Can be used inline with other effects pedals, or directly connected to amplifiers or PA systems using regular 6,3mm guitar cables. large input gain knob. Active battery-powered output circuit improves headroom, especially when used with high-gain amplifiers in the AmpliTube app, reducing feedback and crosstalk when recording. bypass switch allows engaging or bypassing the AmpliTube app chain of effects – like a traditional stompbox – for seamless integration into any existing rig. Ultra-compact form-factor can be easily carried on the road. Features a 3.5mm/1/8" jack for silent practicing with headphones. for AmpliTube FREE app (Appstore Download) and can be used with any other guitar processing app that uses the iOS mini-jack, Compatible with iPhone/iPod touch/iPad