This is a K2-4CH CCTV AC/DC power supply box featuring voltage regulation for cable length compensation
Specifications: Designed for 4 channels with a total power output of 50W, accepting an input voltage range of 110V-230V.
Voltage Regulation: The unit allows for adjustable output voltages of 12V, 13.5V, or 15V to compensate for potential line loss over longer cable distances.
Protection: It includes built-in protection features for over-current, short circuit, and over-voltage scenarios