Refurbished - Includes a full-size keyboard with numeric keypad, USB Dongle, and mouse. The keyboard features a low-profile, quiet keystroke with SX scissor mechanism. Connectivity: 2.4 GHz wireless via USB receiver. Battery: 2 AAA batteries (NOT included). Special Keys: Multimedia keys, programmable keys via Cherry Keys software. Compatibility: Windows, macOS, Linux. The mouse is symmetrical design for left and right handed users and features a 3 button scroll wheel. Battery: 1 AA battery (NOT included). Connectivity: 2.4 GHz wireless via USB receiver.