Display Operation Battery Charger:When the display shows that the power is lower than 9V or the “Low Battery” indicator light flashes, please recharge the device. Battery OFF/ON Switch:Battery on/off switch (Note: please turn off the switch when not in use). Connect the camera head to the cable coil, turn on the ON/OFF switch on the control panel, and the system starts. CLEAR:Counter reset button/meter and feet switch button. LED: LED brightness adjustment (0-5 gear). Screen OFF/ON Switch:Turn on/off the screen, not the system. TF card Slot:Including 32GB, maximum support of 128GB card. Battery Indicator:It flashes when low battery. - Menu Settings (need to exit REC mode):Press the "MENU/EXIT" key to enter the menu settings. Press "" to select, press "Rec/-" to confirm, and press "EXIT" to return. Allow operating time setting/playback setting/display setting/recording setting/system setting. - How to Record Video:Press "REC/-" to start recording (video with audio), press again to stop recording. - How to Playback Images/Videos:Press "PLAY/+" to enter image browsing, press it again to enter video playback, press "" button to select, press "REC/-" to play, press "EXIT", then "PLAY/+" to exit. - How to Take Photos:Press ">/PHOTO" to capture a photo, press one at a time. - How to Zoom the Image While Recording:Press "" to select one of the pictures or videos, press "MENU/EXIT" and ">" to enter delete or all delete options, press "REC/-" to confirm, press "PLAY/+" again to exit. - How to Modify Video Length:The recorded video will be divided into fixed-length videos and stored in the memory card, and the default length is 3 minutes. You can adjust it up to 10 minutes. Press "MENU/EXIT" and ">/PHOTO" to select "Video Menu", press "REC/-" to change it to 1min, 3mins, 5mins, or 10mins, and press "MENU" to exit after setting. - How to Set Recording without Audio: Press "MENU/EXIT" and ">" to select "System Settings", press "REC/-" to enter sub-options, press ">" to find "Sound Settings", press "REC/-" to adjust, turn on or off, press "MENU/EXIT" to quit.