What's the function of this Hardwire Kit OBD? Supports for dash cams with parking mode: When vehicle isturned off, AZDOME OBD hardwire kit will automatically notify dash cam to start parking monitoring mode. Low Voltage Monitoring: When AZDOME OBD hardwire kit detects that the battery voltage is too low, it will automatically stop drawing power from the battery to prevent the battery from being over-discharged. Efficient Power Output: Equipped with high-quality cables, AZDOME OBD hardwire kit can deliver a maximum output current 2.5A. Compatible with multiple devices without sacrificing performance.