Green laser pointer ,page up and down ,matching receivers which can be built-in flash memory (optional). Technology:InfraredFuntions:Green laser pointer,page up and down,built in flash memory optional(64MB-16GB)Contronl distance:15Dimension:16*1.6cm Battery:AAA*2pcs.USB plug and play,no driver requiredOperating system: Windows98,Se,Me,2000,XP,MacOS,Linux,Vista. Green RC laser pointer