This module output has an impact on the module capacity itself and the pre and post-class load and other factors; The following figures for professional equipment measured results, without taking into account other factors. Power module is a kind of electronic components, please do not buy the item if you have no electronic knowledge. This module properties: it is a non-isolated step-down constant current, constant voltage module (CC CV) charging moduleSpecification:Input voltage: 4-35V Output voltage: stepless regulation (1.25-25V discharge regulation)Output current: 3A Max (if more than 15W, install heat sink)CC range: 0-2A (adjustable)Rotary light current: CC value* (1%-100%), default 0.1 timesMinimum voltage difference: 2VMoutput voltage: 15W natural coolingConversion efficiency: 80% (the higher the output voltage, the higher the efficiency)Operating Temperature: Industrial (from -40 deg; to +85 deg;) (ambient temperature above 40 deg;, less power consumption or adding radios