1Bluetooth 5.1: Folding keyboard has built in Bluetooth 5.1 support for pairing up to three devices with the keyboard, so you can switch between them with a single click, even when using different operating systems. 2Numeric Keypad: The Bluetooth keyboard with numeric keypad is designed for customers who often need to enter numbers, making it easier and more efficient for you to work anywhere. 3Operating System Support: Keyboard supports for OS X, for iOS, for Windows, for Android, etc. Maximum working distance is up to 10 meters. 4Battery Powered: The portable Bluetooth keyboard is powered by a rechargeable lithium battery, which requires only two hours of charging and up to 90 days of standby time. If not used for 10 minutes, it will enter power saving hibernation mode and any key will wake it up. 5Foldable: The Type C charging port can be easily adapted to other devices' Type C data cable chargers, which can be folded into the palm of your hand and is lightweight, making it easier to carry around in your pocket. Item Type: Foldable Bluetooth Keyboard Material: ABS Connection Mode: Wireless Bluetooth 5.1 Wireless Distance: Approx. 8-10meter / 26.2-32.8ft Number of Keys: 81 Keys Key Structure: Scissor Foot Charging Interface: Type C System Support: For OS X, for iOS, for Windows, for Android, etc. Battery Type: Built in 140mAh Lithium Ion Battery Usage Time: 45H Standby Time: 90 Days 1 x Foldable Bluetooth Keyboard (Ship with Inbuilt Battery) 1 x Data Cable 1 x User Manual