1The wireless keyboard is 4mm ultrathin and lightweight style, easy to carry and install. 2Bluetooth 3.0 wireless fast connection, effective working distance up to 10m, saving wiring trouble. 3Builtin 350mAh lithium battery for long standby time, and USB power supply line provided, no need to worry about power supply problems. 4Fourdriven bezel design provides daily protection for the screen, ventilation and heat dissipation, no heat for a long time. 5With strong magnetic adsorption, it is not easy to fall off after installation and has a comfortable button feel. Item Type: Wireless KeyboardEffective Working Distance: Approx. 10meter / 32.8ftWorking Voltage: 3.0-4.2VWorking Current: <2.5mA (when the touch screen is working)Charging Current: 200mABattery Model: Lithium batteryBattery Capacity: 350mAh (built-in)Interface: USBColour: BlackApplicable Model: Applicable for Microsoft Pro 3/4/5/6/7 1 x Wireless Keyboard1 x Data Line1 x User Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin