... up/down function (3)USB plug-and-play (4) USB flash memory, ranging from 0-4G *Green Light Wireless Laser Pointer*Page ... , WORD, EXCEL, Internet Browser, Picture Browser, etcBuild-in USB Flash(Optional Function)RF technology, control distance to 10mUSB plug-and ... the transmitter signal.LED on: receiving the transmitter signalUSB flash: no memory/1GB/2GB/4GB/8GB(Optional)4.BATTERYAAA 1PCChange the ...