Review on 🔌 [2021 Upgraded] Qidoe Aluminum Metal Dual USB Socket with LED Voltmeter & ON/Off Switch – Quick Charge 3.0, 12V/24V USB Outlet for Car Boat Marine ATV Bus Truck and More by Charles Long

Bought for our trailer's battery box. Viewing readings with the dust cover on is such a saving! You used to have to get up and open the case to see how the panels worked. The case is just over 1 inch threaded so it took a bit of drilling a hole for it which I didn't have. I also installed it directly on the battery. Clamps so the included wiring harness had to be adjusted, but the secure fit on the actual unit made up for the quick crimping. Smaller threaded case and it will definitely get 5 stars!