Review on 🔌 Linkstyle Dual USB Charger Socket Power Outlet with Digital Voltmeter Display - 12V 4.2A, Waterproof Dual Ports for Car RV Boat Marine Motorcycle Mobile - Blue by Wayne Laguna

I'm surprised by the reviews how bright it is. It's on my bike and I can't read the display during the day, even in the shade, even with my hand over it. The window in the lid is nice, but it's tinted and you can't see through it in any brightness. Readable in the garage, not too bright but sufficient. I've seen this do the trick in an RV or under the dash. I have the blue LED version and the blue LEDs seem to be less intense than the red and green. It was 0.1V higher than my Fluke, which I think is close enough.