5Pcs DC-DC MT3608 DC Voltage Regulator Step Up Boost Converter Power Supply Module 2V-24V to 5V-28V 2A Max Description: 1. The Maximum Output Current: 2A. 2. The Input Voltage: 2V ~ 24V. 3. The Maximum Output Voltage: 28V. 4. Efficiency: Max 93%. Mechanical Properties: Product Size: 36 mm * 17 mm * 14 mm. Method Of Use: The module of the IN+ and - after 2~24v, IN adjusting the potentiometer can adjust output voltage, output voltage is greater than the input voltage. Matters Needing Attention: 1. The input voltage should not exceed the maximum input voltage. 2. The peak current output current is no more than TV university. 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) package include: 5pcs MT3608 2A Max DC-DC Step Up Power Module Booster Power Module