It is a voltage regulator card that will be very useful when setting up a circuit on a breadboard. Reduce the input voltage from 6-12V to 12V, 5V and 3.3V (input voltage must be at least 1V higher than the voltage to be used). The regulators for 5V and 3.3V are located on the card, and the 12V output is directly connected to the input voltage. The 5V line can provide a maximum current of 800mA.
Dimensions: 4.5cm x 4.5cm