LM2596 Based DC-DC Variable Power Supply Module

This listing is for an LM2596 based DC-DC variable step down power supply module that has been fully assembled and tested in house.  The video above serves to show you how it works, and how to use it.  The video also shows you how it was assembled.  There is an on board bridge rectifier that allows for you to use DC or AC power at the input.  This, and everything else is talked about in the video.  The specifications are below, and the second image shows off the schematic. No hard copy of the schematic is included.   If you have any additional questions, please don't hesitate to ask.  We also sell these in DIY kit form for a few dollars less, so check out our store!  

Specifications:
Input Voltage: 4v - 36v Max (DC Only)
Output Voltage: 1.25v - 36v  
Source Current = 3A Max Surge - Up to 2A Nominal
Size (Assembled with variable resistor): 76mm(L) x 35mm(W) x 26mm(H)