1Ultrathin and light 4mm style, easy to use and carry, and with RGB backlight, it can be used in dark places. 2Bluetooth 3.0 wireless fast connection, effective working distance of 10 meters, use is not restricted by location. 3Builtin 550mAh lithium battery, long standby time, and USB power supply line, no need to worry about power supply. 4The fourdrive baffle design provides daily protection for the screen, ventilates and dissipates heat, and does not heat up for a long time. 5Strong magnetic adsorption, not easy to fall off after installation, and can provide a comfortable button feeling. Item Type: Wireless KeyboardEffective Working Distance: Approx. 10meter / 32.8ftWorking Voltage: 3.0-4.2orking Current: 200mABattery Model: Lithium batteryBattery Capacity: 550mAh (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