NOYITO Ultra Small Digital Voltmeter Battery Review

Small in size and light in weight,quite easy and convenient to carry out. There are four colors of red, blue, yellow and green. 0.28" visible LED display, easy to read even in dim light. It requires extra power supply of 4V to 40V; only has three-wires for simple connection.It can also be used as a two-wire voltmeter. For the wiring diagram, please refer to the third wiring diagram on the left. Please pay attention to the parameters of the two-wire voltmeter. With reversed connection protection, meaning it will not burn even when wires are connected reversely. Has resolution of 0.1V and the potentiometer in the back side for accuracy adjustment 【The second and third pictures on the left are the wiring diagrams.】.