Specifications: Input: DC 3V to 35 V (input voltage must be 1.5 V higher than the output voltage, no boost). Output: DC 1.5V to 35V voltage is continuously adjustable, maximum output current is 3A. All use good quality solid-state capacitors, 36u thickening circuit boards, high-Q inductance with output LED indicator. Easy and safe to use, it is really a wonderful adjustable voltage set down module for choice.