This Device Turns a Normal Laptop to a Tablet.

 AirBar is a tiny strip that plugs into the USB port on your PC (now including the MacBook Air) and turns non-touch displays into touch-friendly devices. To accomplish this, the plug-in device uses magnets to attach to the bottom of your screen and emit an invisible light field over the monitor. It is available in 3 different sizes 13.3, 14.0, and 15.6. 

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