LM2596S Step-Down LED Voltmeter Module

Module Model:LM2596 Buck Converter + Voltmeter
Cutting Size: 66mm x 35mm
Input Voltage: DC 4.0?40V
Output Voltage: 1.25V?37V (continuously adjustable, the input voltage must be 1V higher than the output voltage)
Output Current: 2A(normal and stable), 3A Max.
Ripple Frequency: About 150Khz
Ripple Peak: About 100mV
Display Color: Red
Voltage Meter Error: ?0.1V
Measure Range:4~40V (for measure accurately, please ensure that the input voltage is more than 4V)