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 adjustableOutput 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: 0.05VCurrent display resolution: 0.005AConversion 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:YesOutput end anti backflow:YesShort circuit protection:YesWorking frequency:180KHZDue to different batches, there may be differences in product appearance and printed text, which will not affect use.Colour:BlackMaterial:ABSPackage Contents:1 * Voltage Regulator ModuleOnly 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.