... and low price Portable speaker/ multimedia speaker/Hamburger mini speaker SpecificationItemMultimedia speakerSpecial FeaturePortable, MiniSpeaker4ohm, diameter:40mmLine Input3.5 ... Power2WPower Supply InputMINI USB (5V/500mA)UseHome Theatre, Portable Audio Player, Mobil, laptop, etc.ColorOptionalRecharge1. Via ... digital sound card inside the speaker. portable speaker for mp3, mobile, computer