Review on WMYCONGCONG 5 PCS 12V 2 Channel Relay 🔌 Module Optocoupler Expansion Board - Efficient & Reliable Control Solution by Jorge Tupou

I built an Arduino based cocktail maker with drinking fountain pumps, so I needed relays to control the pumps. These work great. The only problem I had was when I was careless in testing and flooded the relay board with water and shorted it out and turned on the random pump. But a couple of paper towels and a hair dryer solved the problem and the board worked perfectly again. It wasn't their fault, it was certainly my fault, but it was great that the board was strong enough to withstand the water and come back swaying. Would definitely buy again.