Body Camera needs to install a memory card before it can be used (64G SD Card Included). Note: Please install the memory card before using Body Camera for the first time. Function usage and operation guide Video recording: In standby state,short press Power/Videokey,and then the blueLED slowly flashes,which indicates the video recording state.Short pressPower/Video"key to stop video recording,and the blue LED willbe on.The video data is saved as one AVI file every 5 minutes. Audio recording: In standby state,short press the "Audio"key,and then the yellow LEDslowly flashes,which indicates the audio recording state.Short press the"Audio"key to stop audio recording,and the blue LED will beon.Theaudio data is saved as one WAV file every 1 hour.