Description: Buck power converter showing power, Voltage and current with USB output connector(charger for digital devices). With short-circuit and over-temperature protection,output automatically shut off if over temperature. Two working modes of constant Voltage and constant current; has red LED indicator for mode notification. It can be used as an ordinary buck module with overcurrent protection capability, battery charger, and LED constant current driver. With crystal shell, safe, practical, convenient and beautiful. Specification: Input voltage: 5-36V Output voltage: 1.25-32V continuously adjustable Output current: adjustable, up to 5A (recommended for use within 4.5A) Output power: maximum 75W (recommended to use within 50W, please use lower pressure for large pressure difference) Working temperature: -40~+85 degrees Operating frequency: 180KHz Conversion efficiency: up to 96% Short circuit protection: Yes Over-temperature protection: Yes (automatic shutdown output after over-temperature) Reverse input protection: No, (Please input high-current diode in series if necessary) Installation method: 4 pieces of 3mm wire Wiring: terminal or welding terminal, V-IN is input, V-OUT is output Module size (L:W:H): 68.2x38.8x15 mm / 2.68x1.52x0.59 inch Weight: 73g Package Includes: 1 package module 1 package shell Note: If the module can not be adjusted, the output voltage is always equal to the input voltage.When you encounter this problem, please counterclockwise rotation of the potentiometer 10 laps or more, then you can adjust the output voltage. Because the factory default output voltage is 17V. Module output terminal string has a current sampling resistor, there will be 0-0.2V voltage drop after connected to the load, it is a normal phenomenon. If its output is more than 3A/35W, please enhance heat dissipation! This DC converter is single output, the output voltage of the USB port is the same as the output voltage of the module, if your load is USB device, please make sure the module's output voltage is set at 5V.