iASUS Mobile Amp (White) Extends playtime of media device by as much as 50% Provides a 10 dB volume boost with no more than .3% harmonic distortion Rechargeable Lithium battery (up to 20 hours from one charge) Lightweight, pocket friendly profile (6 oz., 2'' x 1.4'' x 0.6'') goes wherever you do Compatible with devices bearing 3.5mm audio jack, including iPods and other MP3 players, mobile phones, laptops computers, tablets, and handheld game consoles