TECNOIOT 2pcs LM2596 DC Adjustable Step Down Power Module + LED Voltmeter DC/DC

【LM2596】 LM2596 DC 4.0 ~ 40 to 1.3-37V Adjustable Step-Down Power Module + LED Voltmeter DC / DC 【Easy operation】 Input voltage range: 4-40 v (40 v to limit the highest voltage).Output voltage range: 1.25V - 37V (decompression mode, input output must be greater than 2V above). 【Design compact】 With voltage display function, the displayed accuracy is ± 0.05V, range is 0 - 40V. (Note: in order to voltage display more accurate, please ensure that the input voltage is higher than 4V). 【High Performance】 Button to switch measurement of the input or output voltage, and LED Indicates the current measurement of the input or output voltage; The nixie tube can be turned off by another button.Mentioned In These states are able to be memorized, is not lost even if the power is disconnected.