Note This is a DIY kit you need to assembly it supply schematic diagram only Feature Constant current outputWide operating voltage 3 5V 12VALC circuits do not need to connect diodes or transistorsThe brightness level can be adjustedThe circuit board adopts military grade 1 6MM FR4 sheetPCB dimensions 40mm x 19mm Package includes 1 x PCB board2 x XH2 54 2P curved seat2 x XH2 54 2P line1 x 100 ohm resistance1 x 10K resistance1 x 2 2UF electrolytic capacitor1 x 10UF electrolytic capacitor1 x 103 blue and white potentiometer1 x KA2284 chip5 x 5MM green to green LED1 x 5MM red to red LED