Features: 1.Dual Channel: Card slot wireless keyboard adopts dual channel design. When connecting two devices, you only need to switch the position of the switch to achieve device connection switching. 2.Support System: BT keyboard supports for OS X,for Android,for Microsoft operating systems, and is equipped with hot keys and shortcut keys, which can be switched with a simple operation. 3.Card Slot Design: Wireless BT keyboard adopts a unique card slot design, which can play the role of supporting tablet and mobile phone. 4.High Sensitivity: The office keyboard adopts scissor foot structure, which is light, quick response, comfortable and excellent in hand, and can bring you a comfortable experience with just one click. 5.Small Portable: The wireless keyboard has a compact structure and is easy to carry and use, allowing you to enjoy a quiet typing experience anytime, anywhere, ergonomically designed and comfortable in the hand. specification:Item Type: Card Slot Wireless Keyboard Material: ABS BT Version: V3.0 Transmission Distance: 10m Charging Interface: Type C Number of Keys: 78 Keys Battery Type: 300mah Li ion Battery (built in) System Support:For Windows,for OS X,for Android PackageList:1 xCardSlotWirelessKeyboard 1 x Charging Cable 1 x User Manual NoteShips with built in battery.