Volkano Krypton Series Wired Keyboard And Mouse Combo (VK20122BK) - Keyboard: Key System Membrane, Cable Length: 4 ft / 1.4 m, Function Keys: 12, Operating Voltage: 4.75 ~ 5.25 V DC, Connection Method: USB, Mouse: DPI: 1000, Buttons: 3, Sensor Type: Optical, Scroll Wheel, Compatibility: Windows, MacOS, Linux, Android 4.4 up