generic relay module. does what it should do. looks good. of you stay well below the maximum ratings. they'll keep working forever. heavy loads will melt the relay contacts resulting in malfunctioning or resulting in sticking contacts. there are many similar boards with the same components, this seller was just a little cheaper. this is the first time I shopped with this seller and I'm happy everything went well.
generic relay module. does what it should do. looks good. of you stay well below the maximum ratings. they'll keep working forever. heavy loads will melt the relay contacts resulting in malfunctioning or resulting in sticking contacts. there are many similar boards with the same components, this seller was just a little cheaper. this is the first time I shopped with this seller and I'm happy everything went well.