Embedded wireless bluetooth physical keyboard which allows for fast and responsive typing. * Wireless 3.0 interface standard; Operating distance to 10 meters * Modulation System: GFSK; Operating Voltage: 3.0-5.0v * Standby Time: 60 days; Charging Time: 4-5 hours * Lithium Battery Capacity:160mA; Uninterrupted Working Time: 55 hours