Features: 1. This Keyboard Supports Both And Windows Systems, With Two Modes Of Wireless And Bluetooth, And Three Computers Can Be Connected And Converted At The Same Time 2. This Product Is Specially Designed For Notebook Users Who Need Digital Input Functions. This Excellent Digital Keyboard Provides A Simple And Fast Input Experience 3. Automatic Reconnection: The Keyboard Automatically Connects To The Last Paired Device. Compatible With Windows, Android, , 10s Systems: And Convenient 4. Rechargeable, No Need To Replace The Battery, The Button Is Designed With "Scissor Foot Structure", Which Effectively Reduces Incorrect Input, And The Button Is More Comfortable And Faster To Input. 5. Sandblasted Aluminum Alloy Shell, Elegant And High Durability, Built-In 300m Rechargeable Polymer Lithium Battery, Continuous Work For 20 Hours, Standby For 30 Days; Description: 1. Number Of Buttons: 35 2. Battery Capacity: 300mA 3. Bluetooth Version: Bluetooth 3.0 Or 5.0 4. Battery Life: 80 Hours 5. Working Frequency: 2.402-2.480ghz 6. Standby Time: 600 Hours 7. Power Supply: Built-In Lithium Polymer Battery 8. Usb:Type C Plug For Charging 9. System Compatibility: Os 10.0 Above,| Os9.2 And Above, Compatible Withi , , Air/Pro. Windows 2000/Xp/Vista/7/8/10, Android System Color: Dark Gray Material: aluminium alloy Package Contents: 1 x Keyboard 1 x Data Cable 1 x English Manual 1 x Receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.