... function with solid-state, and the operation is not affected by surface damage;3. The toughened glass (Unique anticorrosion, anti-dazzle ... , which allows you to write, move, rotate, zoom in/out object and shift page, etc. with your finger instead of e-pen ... efficient;Wireless Bluetooth WIFI, and earphone can be built in;The operating page can be stretched;Abundant teaching resources -- the software of ...