About this item Convert unstable 8V-40V DC power supply into stable 5V 3A DC power output. Over-voltage, over current, over temperature, short circuit auto protection, and can return to normal conditions during operation. Essential for car audio systems or other 5V car products (particularly useful in vehicles with 24V power supply). Input voltage: 12/24V (8V-40V), Output: 5V/3A. This Voltage regulator is widely used in automotive, surveillance systems, railway signals, medical equipment, instruments and meters, LED products, LED strips, cable TV, and other low power test systems. Dimensions: 2.5 x 0.8 x 2.2 inches.