The VTT101 is USB powered compact line controllers designed to make the most valuable studio or live space, and are small enough to take on any musical journey. VTT-101 had been designed with scratch performance in mind. Featuring a 5" giant touch sensitive jog wheel, and a super smooth crossfader with adjustable curve. Just plug and scratch MP3’s. you can pitch using the outer part of the jog, and scratch with the inner part.