Quantity: 1 - Color: Black - Material: PU + EVA - Speaker Diameter: 50mm - Speaker Quantity: 2 - Impedance: 40 ohm - Frequency Response: 275Hz~20000Hz - Power: 2W - Battery: 500mA (rechargeable Lithium battery) - Working time: 6~7 hours - Powered by mini 5-pin USB port (cable not included) - 3.5mm audio jack (25cm-cable) - Compatible Models: Universal 7" tablets and other devices smaller than 7" and with 3.5mm audio jack - Features: - This product is not only a leather case but also a speaker - It can protect your tablet PC very well - With built-in speaker powerful sound effect - It enables you to watch movies and read e-book comfortably - Packing List: - 1 x Protective case with speaker