The Multi-Device Dual Wireless Compact Keyboard lets you connect and switch between up to three devices at a time (computer, tablet, or phone), using Bluetooth (3.0 or 5.0) or 2.4GHz wireless with 128-bit AES encryption. Smooth, responsive scissor keys include multimedia hot keys. Windows, macOS, iOS, and Chrome OS compatible. Low battery indicator, so you re never caught off guard. Includes two AAA batteries. Three-year warranty.