1) Main Material: ABS plastic 2) Color: Gold, Rose Gold, Silver, Black 3) Number of Keys: 78 keys 4) Bluetooth Version: Bluetooth 4.0 5) Power Supply: Built-in high-capacity 90 mA rechargeable lithium polymer battery 6) Working Voltage: 3.0 ~ 5.0V 7) Effective Use Distance: 10M 8) Accessories: English manual 9) System Support: Supports all Apple iOS systems, suitable for Apple ipadpro9.7 and ipadair2 tablets 10) Applicable : Use it by yourself, send friends, give gifts, give promotions in commercial activities, be a prize, employee benefits, etc.