Volkano Krypton Series Wireless Keyboard And Mouse Combo (VK20123BK) - Keyboard: Key System Membrane, Function Keys: 12, Batteries Required: 1 x AA (Excluded), Operating Voltage: 1.5 V DC, Wireless Mouse: Buttons: 3, Sensor Type: Optical, DPI: 1000, Scroll Wheel, Wireless Type: 2.4 GHz, Batteries Required: 2 x 1.5 AAA (Excluded), Compatibility: Windows, MacOS, Linux, Android 4.4 up