Module Features: Small volume adjustable boost module, can be easily installed in various small equipment. Can use MicroUSB input, use USB charger or mobile power supply through mobile phone data cable You can easily get the common voltage of 9V, 12V, 15V, 18V, 24V, which is very convenient to use. Ultra-wide input and output voltage, ultra-high conversion efficiency. Module Features: (1) Output current: 2A (recommended to use within 1A) (2) Input voltage: 2v--24v (3) Output voltage: > 28 v (recommended to use within 26V) (4) Efficiency: > 93% (efficiency is related to the pressure difference between input and output) (5) Size: 30mm* 17mm* 14mm (L*W*H) Precautions (1) This module is a booster module, the output voltage should be greater than the input voltage (2) The peak current output current does not exceed 2A (3)When the module output voltage can not be adjusted, the output voltage is always equal to the input voltage. Please adjust the potentiometer counterclockwise 20 laps or more. (Let potentiometer against your chest, counterclockwise turn boost)