Feature: Adjustable regulator module with LED display.2A or less can be loaded, AC or DC voltage input.The output voltage is 1.25V-28V DC continuously adjustable, versatile for DC board.Using double adjustment potentiometer to ensure good contact, effectively protect the load.Notice:The minimum differential between input and output is 3Vthe input must be higher than the output voltage above 3V to be regulated.Buck, not boost, when input 5V output 1.25-2V, not 6V.Specification: Input Voltage: DC: 0-30V; AC: 0-22VOutput Voltage: DC 1.25-28VOutput Current: 2A(Max.)Size: 62 * 59 * 27mm / 2.44 * 2.32 * 1.06in (L * W * H)Weight: 42g / 1.5ozPackage Weight: 47g / 1.66ozPackage Included:1 * LM317 Adjustable Voltage Regulator Step down Power Supply Module