Universal touch keyboard for tablet phones $ 37.87 Main material: selected ABS plastic materials, ABS buttons Number of keys: 78 standard keys and touchpad Bluetooth version: Broadcom chip Bluetooth 3.0 Built-in battery: polymer battery, charge for about 3-4 hours Battery capacity: 290 mA Working voltage: 3.0~5.0V Standby time: 60 days Use distance: 10 meters