... no less than 200m6.outlooking:the pen body use rubber and high quality painting Specifications1.laser pointer, slide changer 2.remote presenter 3 ... memory 4.Custom logo,CE Color: black/silver/blueFunction: 1,laser pointer; 2,page up/down; 3, built-in memory optional4, play ... 1 Working voltage: 12V Wavelength : 650 nm Max output : < 1mW ; < 5mW Receiver Operation system : Windows 98,Se,Me,2000,XP, Mac ...