A general purpose power regulator and supply board. It basically takes an input of 7-20V AC or DC and outputs a constant voltage of 5V. It can supply a maximum of 1A of current at 5V.Comes with appropriate rectification, filtering ciruits, an On/Off switch that controls the power at the output, a power indication LED and mounting holes for easy mounting. All inputs and outputs can be provided through standard screw terminals, which allow easy connections. This board is great for generating constant voltages during prototyping, testing, experimenting, etc.