Digital Voice recorder USB Drive USB 2.0 USB disk. High quality voice recorder, WAV format for the record files. Built-in high quality microphone. Up to 60 hours of recording (2G). With clock system, remember the record time. No need set up the time of the system, will update by itself when you connect it to the PC. Built-in 128M-8G flash memory. No need driver except windows 98. Built-in Li-battery, charged by USB on PC, full charge with 1.5 hours. LED instruction (Optional). 10. Built-in software of the recorder files list, it will list all the files when connect to the PC,Easy to check the files. Start voice record: Make sure the battery is full charged, turn on the unit, the system enter to initialization and the blue light is on, after initialization, red light start wink (or keep red light, optional), it starts record. When there is low battery, the blue light wink fast and turn off by itself, at same time will save the recorder files Stop record: Turn off the unit, and save the record file same time Connect to PC: No matter under ON/OFF, the unit will work as USB disk when it connect to the PC, and the battery is charging Blue light wink means the battery is charging Blue light stop wink means full charged. Every time connect to the PC, the unit will run the files list software, list all the record files. And it works as normal USB disk too, can delete the record files too.