Main material: aluminum alloy metal, ABS Battery type : cNo. 5 battery (AA type) Input parameter :1.5V = 100mA Connection method : Bluetooth low energy 4.2, RF 2.4GHz Device name :MIIW KB Air 85 Working range :(Varies with computer settings) Operating temperature : 0C-40C Product size :320.5x125.5x 24.5mm The net weight of the product is about 495g (including battery) Support system: recommended to adapt to Windows 10,macOS 10.10 or Android 6.0 and Above version Executive standard :GB / T 14081-2010