2 Pieces DC 4 to 28V Car Digital Voltmeter 12V Voltage Meter Car Audio Gauge LED Display 12V Waterproof Voltage Gauge Meter for Motorcycle(Blue Light)

Worked perfect for my power supplies on my radios. Easy to install and came with double stick tape. The wires are a real small tiny gauge. Tinned the tips and soldered them to existing power wires. Red seemed it would be a little easier on the eyes at night as they are bright. Definitely recommend them for ham radio power supplies.

These work great stuck on the dashboard. Large enough to see easily. I have one on a 'cigarette lighter' plug and it shows the car battery when the ignition is on; I have the other connected to a portable battery in the car which I use to power my ham radio rig, and now I always know when that little battery needs to be charged.

I got the white LED so that I could put it on a pole outside my solar battery bank. Measured it against a standard VOM, and was within .05 bolts of the VOM. Excellent results. Now I can check on my battery levels at night to see if I need to switch back to the utility or I need to go crank the generator. Some complain about the small wires. They are 22 gauge wires which are now industry standard for most all of your instrumentation wiring. It works excellent. Voltage is very accurate. I bought two , one is a backup.

Accuracy is fair, measuring about -0.016%. Current drain is about 30 milliamps; too much to leave 'ON' for weeks at a time when using 'stand-alone' to verify a car battery's charge state. In other words it will discharge your car battery, in a few weeks. The numerals are not evenly illuminated and are a bit unappealing. The 'Yellow Light' version matches BMW's 'Amber' quite well. The power wire has no strain relief and obviously not waterproof. Nevertheless this product is VERY GOOD, especially since the cost is super low.

So far its GREAT. I did tape around the clam shell joint and silicone it, along with the hole for the wires. Just trying to prevent water getting inside. I also used a sharpie to color over the lettering on the outside of it. I wanted it all black.

Works well for my use. I am setting up in house 12 VDC system to run various systems especially for power outages. Nice to just glance and see what battery status is.

Good deal

Affordable digital voltage meter that will get the job done though im not exactly sure if the calibration is off at lower voltages (12v-14v) but when I switched over to lithium from AGM and upped my charge voltage to 15.3v the biggest difference I saw was .6v when double checking with a couple other DMM's.

Sottili e molto luminosi sono anche facili da installare grazie al biadesivo già presente. La misura è precisa compatibilmente che è disponibile una sola cifra decimale.

Used these on my power supply and not very accurate at all ended up getting some different ones from another supplier

Brilliant

Bon produit Affichage lisible au dessus de 6v Testé à 28v pour usage éventuel sur batterie 24V Achat prévu pour d’autres exemplaires

Die LED-Anzeige ist hell und deutlich lesbar. Für meine Zwecke ist die Genauigkeit vollkommen ausreichend. Mit dem mitgelieferten Klebepad, kann die Anzeige problemlos montiert werden.