It is a non-isolated DC regulated power converter module with long service life. High performance and stable output power, convert 4-32VDC to 1.2-32VDC. High-quality components ensure a high efficiency of up to 98%. Equipped with wiring terminals, wiring is simple and convenient. It has the function of constant voltage and current, and supports short-circuit protection. Application range: DIY a regulated power supply with constant current function, which is not afraid of short circuit during use, which can protect the load. Power your electronic equipment. Charge various batteries, set the charging voltage and charging current according to the batteries of different voltage and capacity, with charging indicator function, convenient to observe the charging status. Use solar panels to supply power to charge various batteries, with constant current function, which can prevent the battery from overcharging and effectively protect the battery. Drive high-power LEDs, which can be freely combined in series and parallel. As the vehicle power supply, it can supply power to your mobile phone, laptop or various digital products. Method of setting voltage and current: Set the output voltage: According to the float voltage value of the battery you want to charge, or the voltage value of the LED after series or parallel connection, adjust the constant voltage potentiometer (CV) to set the output voltage to the required voltage. (Performed when no load) Set the constant current value: first adjust the CC potentiometer counterclockwise about 20 turns, connect the load with an ammeter, and adjust the CC potentiometer to the current value you need to set. The constant current value cannot be adjusted by means of a direct short circuit. Note: When setting the constant current, the voltage must be higher than 1.2V, otherwise the constant current function will be invalid. Module parameters: Module nature: Non-isolated step-down module (BUCK) synchronous rectification Input voltage: 4-3