KNACRO High power DC-DC DC voltage regulator module, adjustable voltage, DC 4-38V TO DC 1.25-36V, max 5A buck converter Input voltage: 4-38V (Please do not enter more than 38V) Output voltage: 1.25-36V continuously adjustable input must be higher than the output voltage of 2V above Output Current: 0-5A, recommended in 4.5A. Output Power: Recommended for use within the 75W, more than 50W Please add heat sink. Operating frequency: 180KHz