... ): 25ms3Induction accuracy1mm4Shortcut keyProvide firm tool bar buttons, convenient for positioning, writing, screen cleaning, roaming, review, erasing ... display the emphasis parts by spotlight4Screen maskAvailable for whole or partly masking, also masking range ... serviceSupport intelligent upgrading, Free upgrading for life 2011 HT-WB82D Type Electromagnetic Interactive Whiteboards (82inch)