1. Bluetooth 5.1: The foldable 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 if you use different operating systems. 2. Number Keyboard: The Bluetooth keyboard with numeric keypad is designed for customers who often need to enter numbers, making it easier and more efficient to work anywhere. 3. Operating system support: keyboard support for OS X, iOS, Windows, Android, etc. The maximum working distance is up to 10 meters. 4. Battery powered: The portable Bluetooth keyboard is powered by a lithium battery that requires only two hours of charging and up to 90 days of standby time. If not used for 10 minutes, it will go into power-saving hibernation mode and each key will wake it up. 5. Foldable: The Type-C charging port can be easily adapted to Type-C chargers for other devices, which can be folded in your hand and is lightweight for easy carrying in your pocket. ⏪Specification: Item Type: Foldable Bluetooth Keyboard Material: ABS Connection mode: wireless Bluetooth 5.1 Wireless distance: approx. 8-10 meters / 26,2-32,8 feet 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 Duration of use: 45H Standby time: 90 days ⭕List of packages: 1 x foldable Bluetooth keyboard (supplied with built-in battery) 1 x Data Cable 1 x User Manual Turn on the power button switch, press Fn C to go to Bluetooth pairing, after successful pairing you can use.