The Multi-Device Dual Wireless Compact Keyboard Lets You Connectand Switch Between Up To Three Devices At A Time (Computer, Tablet, Orphone), Using Bluetooth (3.0 Or 5.0) Or 2.4Ghz Wireless With 128-Bit Aesencryption. Smooth, Responsive Scissor Keys Include Multimedia Hotkeys. Windows, Macos, Ios, And Chrome Os Compatible. Low Batteryindicator, So You Re Never Caught Off Guard. Includes Two Aaa Batteries.Three-Year Warranty.