10 Pieces direct current-direct current boost converter 2A adjustable module voltage regulator board input voltage 2 Volt-24 Volt to 5 Volt-28 Volt output voltage Specifications: Maximum output current: 2A Input voltage: 2Volt-24Volt Maximum output voltage: 28Volt Efficiency: 93% in maximum (Minimum) (input-output) difference voltage when input is at (2 Volt and 50% of max-input-Volt), loading at (50% and full rated current). Product size: 36 x 17 x 14 mm/ 1.42 x 0.67 x 0.55 inch (L x W x H) Method of use: The adjustment of potentiometer can adjust output voltage, output voltage is greater than the input voltage. Package includes: 10 x direct current-direct current power apply module Attention: The input voltage should not exceed the maximum input voltage. The peak current output current no more than 2A. Tips: Reverse the potentiometer 20 times before taking the goods to test. Some customers report that the output voltage of the module cannot be adjusted and is always equal to the input voltage. When you encounter this kind of problem, please turn the potentiometer counterclockwise for more than 10 turns, and then use the module to adjust the voltage normally.