The Dell Wireless Keyboard & Mouse- KM636 features a sleek, contemporary design that delivers reliable wireless performance in virtually any workspace at a price that businesses will appreciate. Providing the convenience & performance of a wireless workspace, the KM636 is designed to withstand the rigors of office work, while providing a comfortable, full multimedia user experience through the keyboard&153;s contemporary design & chiclet keys. Featuring a 12 month battery life, multimedia shortcut keys & optical tracking, the keyboard & mouse combo offers a dependable & enjoyable user experience. Feature Feature Value Device interface Bluetooth Keyboard layout QWERTYKeyboard language English Keyboard form factor Standard Numeric keypad Y Windows keys Y Connectivity technology Wireless Purpose PC/server Backlight N Keyboard style Straight Product colour White Adjustable keyboard height N Surface coloration Monotone Material Plastic Card reader integrated N Power source type Battery Keyboard battery type AANumber of batteries (keyboard)2 Service life of battery 12 month (s) Mouse included Y Movement detection technology Optical Buttons quantity 2 Scroll Y Scroll type Wheel Number of batteries (mouse)2 Number of scroll wheels 1 Windows operating systems supported Y Receiver included Y Wireless receiver interface USBBatteries included Y Quick start guide Y Internal N