... ;Touch without delay, no handwriting delay, no lag3. Provide built-in and external schemes4. Hight light Transmission over 95%5. Explosion ... VoltageAC220V /315WOperation SystermSupport Windows XP,vista,windows 73,Provide built-in and external two different scheme, easily satisfy different customers' needs ... ;10,Support both of inside and outside environment workable. 46" LCD Monitor