 It has a durable plastic screen that will withstand falls better than glass screens, and it comes with a hinged screen cover that hangs over the screen when not in use.The m105 is identical to the m100 but it contains 8 Megabytes of RAM, and in the box a cradle is included instead of a cable.The m105 had a problem whereby the capacitor that saved the contents of the RAM when changing batteries would fail.