Input Voltage Range DC 3V to 40V (The input voltage must be more than 1.5v higher than the output voltage. It cannot be boosted) Output Voltage Range DC 1.5V to 35V continuously adjustable voltage, high efficiency output current is 3A. All solid capacitors using SANYO36u thick circuit boardsHigh-Q inductors with high power output LED indicator Output with high power conversion efficiency up to 92%. Measured 12V input, 5V output current, 1A load regulation rate is less than 1%. 20 Pack LM2596 DC to DC High Efficiency Voltage Regulator 3.2-35V to 1.25-30V Buck Converter DIY Power Supply Step-Down Module for DIY