Wearable Wristband 4GB Digital Voice Recorder Wrist Watch, One Button Long Time Recording(Black) One button recording: Please push the "Turn On/Off" button to "On" position,the indicator light will shift from red to white, signifying recording is in process Stop recording: In the recording condition, push the "Turn On/Off" button to "Off" position or connect the recorder to the PC by USB interface, the white light will go off, it stops and saves the recording files automatically Playback: After recording completes, please play the recording files on the PC Setting time: Connect the recorder with computer and open the folder "SetUDiskTimea" under the disk directory. Then double click the program "SetUDiskTime(9X).exe" in the folder. After that the time of the recorder will be in sync with your computer system time Charging: Connect the USB interface to computer. When the red light blinks, it means charging, when fully charged, the indicator light steady red. It can continue recording about 20 hours once fully recharged