... protocol data from control equipmentu Power supply: by power and batteryu Low power consumption, auto stand by can save power, it's can display ... charging for 4 hours. u DC 12V/1A emergency power output, can supply power to camera for short timeu Test audio from the ... 11 hours after full charging.Save power function:Low power consumption, auto stand by can save power, it's can display battery dataOTHER ...