... presenter with CE &RoHS Features Easy-to-use 5-button controls Built-in laser pointer* gives you the ability to ... *page up and down*black screen/full screen,*Esc2.4GHz Wireless Connection Presentation remote USB receiverWavelength:630-670nmuses 1pc 3A batteriesDimensions ... Reader etc9.For teching ,Meeting,Speech,Training etc. 2.4G wireless presenter ,USB laser pointer ,Red laser presenter with CE & ...