The Baseus K01B Wireless Tri-Mode Keyboard (Frosted Black) connects up to 3 devices via Bluetooth 5.0, Bluetooth 3.0, and 2.4GHz wireless. Features silent keys, ergonomic design, US layout, and broad compatibility with Windows, macOS, iOS, Android, Linux, and Harmony OS. Powered by 2 AAA batteries with smart auto-sleep mode.