What stands out about this unbranded relay is that the pin layout is printed right on the top for quick reference.
ESP8266 ESP-01 5V WiFi Relay Module Board 2-Channel For IOT Smart Home APP-
A nice touch is the matte finish on this unbranded relay, which resists fingerprints and looks tidy on aYou will find that this unbranded relay is easy to source, and the price stays reasonable for small projects.
You will find that the unbranded/general look helps when you're building kits for teaching or hobby use.
I like that it has a nice touch of being unbranded/general, so you can add your own labeling.