http://www.ikmultimedia.com/iring for more information.
Watch this demo of iRing controlling audio effects in popular DJ apps like DJay 2 and iKaossilator using IK Multimedia's iRing FX/Controller app. Now control your favorite effects and MIDI apps with simple hand movements and gestures.
iRing FX/Controller is a free companion app for use with the iRing that puts the power of motion control in your hands — more specifically between your fingers. iRing FX doubles as a professional quality audio effects processor and a toucheless MIDI controller that uses hand movements and gestures to apply and control effect parameters and/or send MIDI messages to your apps. It's powerful features and effects make iRing an indispensible tool for creative musicians and DJs on the go.