... opaque object can operateNo bright spot,protect user's eyesBoard surface can be used for projection or ... so on leastsHigh-strength panel,resist bump,combat,crape Model GK-880H/78SInduction Principle Infrared InductionTouch Size:78 ... Manual & Quick Installation GuideOptional accessoriesMobile frameIntelligent penholder Interactive whiteboard’s appearance realizes control with computer. It can appear, ...