The Mobee Technology Magic Numpad for apple magic trackpad lets you instantly transform your Magic Trackpad into a convenient number pad. The 3 different layouts provide user-friendly layouts. No need to have a separate calculator on your workspace, no need for more power consumation, whether by battery or A/C. Simply place the layout over the Trackpad, tell the computer which layout you’re using and begin typing. The NUM10 layout features a simple 10-button numeric keypad plus a track pad, while the NUM20 and NUM30 provide additional buttons for added convenience.