The black color gives it a neutral presence that doesn't fight with your wire colors or labels.
80amp 12v Continuous Duty Solenoid Battery Isolator And Starter Relay White 4 Pi
The indicator light helps a lot, and the heavy duty body gives a sense of durability.
What stands out about Model R10-5A10-120 is the even gap between contacts.
The 2pcs - 4pin relays are a handy duo for hobby boards and quick fixes around the shop.
What stands out about the unbranded brand is the lack of logos, keeping the look consistent with other anonymous hardware.
You will find that the black color makes it easier to match with other black connectors and terminals.
You will find that the black color resists showing dust and smudges better than lighter options over time.