0.56 inch DC4.5V-30V 0.56" Digital Voltmeter Voltage Measurement 2 Wires Gauge LED Panel with reverse protectionSpecification: Measuring range: Red DC4.50-30.0V, Green DC4.70-30.0V, Blue DC5.00-30.0V
Power range: No additional power supply, directly af..
1-Channel Relay Module With Optocoupler Low Level Trigger for Arduino one channel Description:
The module complies with international safety standards, the control area and the load region isolation trench.
With the power supply and relay instructions, pull off, disconnect does not sh..