Detailed Product Description wirless usb Laser presenter, wireless laser pointer,rc laser pointerSize:140*17(Dia)mmBatteries:3pcs AG13Material:BrassLogo: print or engraved availableCertificate: CE&ROHSIR TechologyFunction:red laser pointer, page up and down, optional:flash memory available( 128M/512M/1GB/2GB/4GB/8GB)Usb plug, no driver requestSupports windows 98/2000/ME/XP/Linux/Mac osBe used ...