Adesso Compact 1U Design 2-Button Touchpad PS/2 Keyboard for Windows (ACK-730PB) Windows 107 keys enhanced desktop keyboard layout Membrane key switch for quiet and easy typing Touchpad: 2 button Glidepoint Touchpad with scrolling feature Touchpad working area: 2.25" x 1.5" 2 Mechanical Buttons Keyboard Dimensions: 15.75" x 9.25" x 1.25" (L x W x H)