Reference parameters: Modular nature: non-isolated step-down constant current, constant voltage module (CC CV) charging module Input voltage: 5-55V (limit voltage 55v) Output voltage: 1.25-30V adjustable Minimum differential pressure 2V: input voltage must be high output voltage 2V or more, can not boost Output current: 12V to 5V maximum 3A (output other voltage by 15W formula 15 / output voltage = output current Output power: up to 15W, (such as high temperature, please install the heat sink) Conversion efficiency: 80% (the higher the output voltage, the higher the efficiency) Operating temperature: industrial (-40 ? to +85 ?) (ambient temperature exceeds 40 degrees, please reduce the power to use, or strengthen the heat) Full load temperature rise: 45 ? No-load current: 10mA typical (48V to 4.2V) Potentiometer adjustment direction: generally clockwise (increase), counterclockwise (reduced) Indicator light: two-color indicator light, charging indicator red, charging complete indicator green (not connected to the green) Module size: 48 (long) * 24 (width) * 11.4 (high) without potentiometer (including potentiometer high 13MM)