What stands out about the unbranded brand is the straightforward labeling on the coil and contacts for easy identification.
DC 5V 7V-80V 30A ESP8266 WIFI 1/2/4 Channel Relay ESP-12F Development Board
A nice touch is the gentle tension in the terminals on this unbranded relay, which grips wires without crimping them hard.
A nice touch is the gentle tension in the terminals on this unbranded relay, which grips wires without crimping them hard.