Portable speaker for mp3, mobile, computer with good sound quality and low price Portable speaker/ multimedia speaker/Hamburger mini speaker SpecificationItemMultimedia ... HoursRating Power2WPower Supply InputMINI USB (5V/500mA)UseHome Theatre, Portable Audio Player, Mobil, laptop, etc.ColorOptionalRecharge1. Via a ... -in digital sound card inside the speaker. portable speaker for mp3, mobile, computer