The Dual-Device Wireless Multi-Function Compact Keyboard lets you connect and switch between up to three devices at once (computer, tablet or phone) via Bluetooth (3.0 or 5.0) or 2.4 GHz wireless with 128-bit AES encryption. Smooth, responsive scissor keys include multimedia hot keys. Compatible with Windows, macOS, iOS and Chrome OS. Low battery indicator so you're never surprised. Includes two AAA batteries.