What stands out about the unbranded brand is the simple color scheme, which helps you match it with other components easily.
Duplexor Alternating Relay, 120VAC/VAC/DC, SPDT Plug-in Switch, Control Device
You will find that this unbranded relay is quiet in operation, with minimal hum or buzz during long runs.
What stands out about this unbranded brand is the clean coil marking, which helps you avoid wiring mistakes during setup.