You will find that the black color makes it easier to match with other black connectors and terminals.
2pcs DC Voltage Detection Control Relay 6-80V/48V60V24V Battery Charge&Discharge
What stands out about the black color is how it hides minor sc installation and handling.
A nice touch is how the unbranded brand uses a bright indicator LED, so you know at a glance when it's active.
You will find that this unbranded relay fits standard sockets, and the metal tabs feel secure and nicely finished.
You will find that this unbranded relay pairs well with generic controllers, without any branding conflicts or odd fit issues.
A nice touch is the smooth spring action inside this unbranded relay, which feels reliable without being too stiff.
You will find that the black finish helps keep the setup looking tidy even in busy cabinets.