You need this step-down cable to enable parking mode monitoring for your car's drive recorder! Plug Type (4 types in total): MicroUSB-I, MicroUSB-L, MiniUSB-I, MiniUSB-L *Please be sure to check the plug type of your device before purchasing to ensure compatibility. Length: 3.5 meters Input Voltage: 8V-24V Red wire: Positive, connect to ACC power Black wire: Negative, ground Low Voltage Protection Threshold: When the voltage of a 24V battery drops below 23.2V, or when the voltage of a 12V battery drops below 11.6V Operating Principle: Generally, the drive recorder cannot be used when the engine is turned off. However, by connecting the drive recorder and the car's battery with this step-down cable, monitoring is possible even during parking. It also has a battery drain prevention function, which automatically cuts off the power supply to the drive recorder when the battery voltage drops to a certain level. *Specifications and appearance may be changed without notice due to product improvements. *Product appearance may differ slightly from the images due to production lot variations or monitor color rendering. *Our company is not responsible for any loss or damage caused by the use of this product.