Wireless Touch Keyboard K400 Plus is a full size keyboard layout and touchpad in a compact size. Incurve keys are ideal for touch typists and the soft key stroke makes this a quiet keyboard. The full size touchpad gives you the familiar scroll and navigation gestures. With the left- and right-click buttons below the touchpad and the volume control buttons above, control is at your fingertips. For two-hand control, typically used by those who like to use their thumbs to navigate, a left mouse-click button is located on the upper left side of the keyboard-navigate with your right hand, select with your left.TOUCH TAP Press the Fn key and the left mouse button to toggle between touch tap disable and enabled. You can also press the left mouse click button at the top-left of the keyboard to perform a click or comfortable two-handed navigation. You can also tap the touchpad surface to perform a click. SCROLLING Scroll with two fingers, up or down. You can also press the Fn key and slide one finger anywhere on the touchpad simultaneously to scroll for comfortable two-handed navigation. COMPATIBLE COMPUTERS K400 Plus keyboard works with both desktop and laptop computers and is compatible with the following operating systems. Windows® 7 and later Chrome OSTM AndroidTM 5.0.2 and later Keyboard functionality, such as Hot Keys and Touchpad Gestures, may differ depending on the operating system. A quick check of your system settings will tell you if your device is compatible with K400 Plus.