this is like whats in the core,,,,,,,
http://www.dpcav.com/xcart/Adjustable-Voltage-Regulator-1-35V-SEPIC-Type.html
but theres is preset either 5 or 12v,,, this ones variable. Lawmate 1 watt run better down around 10.5 to 11.5 volt. this lets you fine tune it...... these and the l-c type...