... ,write screen,LCD,projector.saving place and easy to control. Noticewireless mike,electronic ferula,write screen,LCD can be ... Peculiarity:multifunctional:integration:PC,digital visual presenter,write screen,LCD,projector.saving place and easy to control.mightiness function of ... ferula1.5--5m150 inch screenscreenwrite screen(15 inch),LCD(17 inch)Inside basic constitution:digital visual presenter ...