communication 220V Please install the incoming cable 1A FusePlease weld carefully,The polarity of components must not be reversed,Especially electrolysis First on Stay from the motherboard Prevention of welding errors Electrolysis event Voltage current potentiometer Be to weld and weld Firm contact In useIf the potentiometer is disconnected,There will be 30V Voltage and 5A Current output The circuit elements parameters are 30V5A Design,Please don't feel freeIncrease the output voltage and current Colour:As shownMaterial:PC+MetalPackage Contents:1 x Adjustable Constant voltage KitOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.