Rechargeable multi-device set for Windows, macOS and ChromeOS. It connects over 2.4 GHz with the included Unifying dongle, or over Bluetooth, to up to three devices. Supercapacitor power gives up to 2 months of use for the keyboard or 1 month for the mouse from a 3-minute charge. It recharges with the included USB-C cable. The mouse reaches up to 4,000 dpi. Programmable keys and buttons. Black.