@reolink-lorenz Hi, thanks for reply, I don't hace privilegies for attachment something!! can you give me an email for send you?

Today arrived my 2 units RLC-810A cameras, putting inside 256GB SD card and connected to POE Switch... everything OK

but when enable AUDIO, I can listen an annoying buzzing, like DC ( electric current) is very irritating and "go and back" periodically.

Can you help me?

thanks in advanced