New Design Fashion Colorful Leather Case Bag, which is made of high quality synthetic PU leather, providing protection from scratches and bumps, and it is easy to place inside a bag or carry alone. Also it"s fashion to bring the case to everywhere, which is with a stable elastic on each corner and a flap to prevent tablet PC slipping. Specification: Speaker Diameter: 50 mm Speaker quantity: 2 pcs Impedance: 40HM Frequency Range: 275Hz-20KHz Output Watt: 2W Build-in battery: 900 mAh Working time: 5-7 hours Audio cable: 350 mm length Audio mode: 3.5mm L mode