A4TECH 4200N Keyboard Mouse Combo is wireless combo. In this combo it has 2.4G Hz Frequency, 10 - 15 m Operating Range and 1000 DPI Resolution. The keyboard of this mouse has 12 Fn Hotkeys, Laser Engraving Character, Adjustable Keyboard Legs, 3 V / 2 mA Rating, 2 AAA Alkaline Batteries. The Mouse has Optical ( Infrared ) Sensor, 1000 DPI Resolution, 1.5 V / 4 mA Rating with 3 buttons. This Black Keyboard Mouse 4200N Combo comes with 01 year warranty.