DELL KM3322W Keyboard & amp; Mouse Combo, Anti-fade & amp; Spill-resistant Keys Wireless Multi-device Keyboard (Black) DESCRIBTION: - Device Type: Keyboard and mouse set. - Interface: 2.4 GHz Type Keyboard/Mouse : Wireless - Wireless Receiver: USB Wireless Receiver Adjustable Height: Yes - Hot Keys Function: Volume, Mute Keyboard Technology: Plunger - Movement Detection Technology (Mouse): Optical Buttons Qty: 03 Movement Resolution: 1000 dpi