... USB receiver.I. Operation SystemWindows 98, Se, Me, 2000, XP, Mac OS, Linux , Windows vista, II. SetupPlug the receiver ... front of receiver between 45° radius)III. Functions Page Up Page Down Blank Screen ( For PowerPoint play only ) ... output< 1mW< 5mWDimension142x20x21mm142x20x21mmReceiverOperation systemWindows 98,Se,Me,2000,XP, Mac OS, Linux, Windows VistaCompatible plugUSB 1.1 USB ...