... entertainment 5.CE,FDA,ROHS FU-Laser Pointer with Remote Control1,FU brand products,popular in ... receiver will be normallyon.if not synchronise with the projector,the LED indicator will be ... 2 times.If the product can't page up/page down as usual,Please re-synchrony again ... for computer presentations.Computer and projector for teaching with,demonstrations,lectures, conferences,and supporting the use ...