This is a DC-DC buck converter module that can convert 3.2V-35V to 1.25V-35V with a maximum current of 3a.-down converter module is used to reduce the voltage. Therefore, make sure that the input voltage is at least 1.5 V higher than the output voltage.The efficiency of -down module is very high, which is useful for the pull-down voltage.It is recommended that the current be below 2.5A for long periods of time. If it is 2A (power more than 10 W), the heat dissipation be changed.The DC-DC module converter is widely used in the low voltage system supply, 6V, 12V, 14V, 24V battery charging and regulated power supply.Type: power moduleModel: Step-Down ModuleInput voltage: 4V-35VOutput voltage: 1.23 V - 30 V.Output current: 3A (maximum)Conversion efficiency: 92% (maximum)Output ripple: less than 30 mVSwitching frequency: 150kHzWorking temperature: -45 Celsius + 85Power supply (3-40 V), the power indicator lights up and the module works normally.Adjust the blue potentiometer knob (usually clockwise to improve, counterclockwise to rotate down) and use a general expression to monitor the voltage required for the output voltage.Caution: As this is a step-down module, it is recommended to work for a long time with a current of less than 2.5 A and to add a heat sink (output power 10 W). Maintain the minimum difference of 1.5V to stable performance.Colour blueMaterial: printed circuit boardSize: 4.3 x 2.1 x 1.4 cmPackage contents:1 * Buck converterOnly the above package content, other products are not included.Note: Light 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.