4 pcs DC 5V 1 Channel Relay Module Board Shield High/Low Level Trigger with Optocoupler sold2024 ) is a special purpose

) is a special purpose

It is used for the first time and can be pasted directly after being torn off

there will be a little color difference of the grinder

2x 3/8 OD Union Connector

4 pcs DC 5V 1 Channel Relay Module Board Shield High/Low Level Trigger with Optocoupler sold2024 ) is a special purpose4 pcs DC 5V 1 Channel Relay Module Board Shield High Low Level Trigger with Optocoupler Module Description: The module uses genuine quality relay, normally open interfaces Maximum load: AC 250V 10A, DC 30V 10A SMD optocoupler isolation, strong driving ability, stable performance; trigger current 5mA The module voltage 5V The module can be set high or low triggered by jumper Fault tolerant design, even if the control line is broken, the relay will not