Input voltage: 5.5-30VDC (When the input voltage is 5V, voltage rise and fall can also be achieved, but the measurement of voltage and current is not accurate; when it is below 4.7V, undervoltage protection is applied) Output voltage: 0.5-30VDC adjustable Output current: 0.2-3A adjustable, with enhanced heat dissipation up to 4A (please enhance heat dissipation when the module temperature exceeds 65 degrees). Equipped with a constant current indicator light, the output power should not exceed 35W or the current should not exceed 4A when outputting at low voltage. Overloading and burning are not guaranteed! Voltage display resolution: 0.05V Current display resolution: 0.005A Conversion efficiency:around 88% Soft start:Yes (there is a possibility of failure during the startup of modules with high power and load) Input reverse protection:Yes Output end anti backflow:Yes Short circuit protection:Yes Working frequency:180KHZ Due to different batches, there may be differences in product appearance and printed text, which will not affect use. Colour:Black Material:ABS Package Contents: 1 * Voltage Regulator Module Only the above package content, other products are not included. Note: Light reflection 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.