You also get built-in hotkey media functions including volume controls. The KB740 operates on just two AA batteries and gives you a long-lasting lifespan of up to 36 months.4 GHz and Bluetooth technologies, you can use the KB740 on a wide range of Windows, macOS, Linux, Ubuntu, and Chrome devices.Control a wide range of systems with the compact and convenient Dell KB740 Compact Multi-Device Wireless Keyboard.