1Wide Application: The Truck Dvr is suitable for a wide range of vehicles including school buses, trucks, boats, engineering vehicles, and yachts. 24 Channel Video Splitter: This Dvr supports 4 channels of audio input and 1 audio output, allowing you to choose the display mode that suits your preferences. 3Information Overlay: The 4 channel backup camera system enables the overlay of important information such as license plate numbers, time, and driving information. 4Safe and Reliable: The truck Dvr operates on a DC12V wide voltage input and is overload protection, short circuit protection, and reverse connection protection. 5Simple Operation: The Dvr host offers convenient operation options such as turning on, turning off, and delayed activation, and it supports full screen automatic display of left turn, right turn, and reverse camera views.