WayinTop 3pcs LED Panel Digital Display Voltage Meter 0.56 Inch 2 Wires DC4.5V-30.0V Volt Tester Panel Meter with Reverse Protection for Car Motorcycle (Red + Green + Blue)

I bought this package of displays as I need to replace some old, broken, mechanical meters with something modern that works.Let's talk about my experience: I received the meters quickly and they came very well packed inside anti-static bags *and* a bubble padded envelope that Amazon put inside an outer bubble envelope. They arrived in perfect shape! I powered them up and checked voltage accuracy - I was pleased. I've got a calibrated multi-meter...and when I put in 5.6893 volts...one meter said 5.68 volts...and the two others said 5.71 volts. That's really quite good for such an inexpensive meter. The meters are nice and bright and look quite attractive!Now let's talk about hacking applications. These meters are very hackable. As sold, they are two-wire meters, meaning that the voltage measured also powers the meter. By removing a resistor and adding a third wire, they can now measure down to 0 volts. NICE! Additionally, the voltage divider is accessible, so if you need a custom scale, as I do for my application, you can change them! (of course you need a soldering iron, proper size SMD resistors, and a very steady soldering hand!) Example: I need a meter that will display 5.00 volts with an input of about 0.30 volts. I can do that with these meters by changing the voltage divider! VERY, VERY COOL.I'm quite happy with these and likely will buy more soon!

These little meters are a good value. It's hard to beat roughly $3.30 per device. With this item you get nice finishing bezels also. Testing against a Harbor Freight digital multimeter which reads 6.33 volts, the red meter says 6.33, the green meter says 6.37, and the blue meter says 6.44. Since voltages above 10 lose a display digit, the meters display less error. For a 12.7 volt battery, the meters are within 1/10 of a volt.These meters are great for monitoring battery drain for a static site, once you know your target value (which is why I bought these). As I said before, they are a good value. However if you need absolute accurate readings, you should get the kind of meters that are adjustable.

I really wasn't expecting much because of the other reviews that complained about brightness and accuracy. All three were very bright and very accurate. Checked it against my astron power supply with a Fluke RMS meter. It was spot on for each. I will be putting the blue one in my 2018 Ford F-150 which currently has no way of reading voltage even with forscan programming. There is no option to put voltage on the LCD screen either. I'll post the follow-up after it's installed in the truck.

Better than you might think -The two-wire display is easily hacked into a 3-wire display, giving a reading of 0 - 100V.The series resistor can also be shorted, allowing it to read the voltage across a shunt resistor, turning this into an ammeter.I used four such displays on my dual 30V / 5A power supply.

Used 2 of them on projects and the has preformed well.

fast shipping, easy to read, good color choice

They are good meters, no complaint.

Very nice

Items were as described. Fairly accurate compared with DVM. Wire connection to circuit board could use a dab of glue to secure wire...otherwise breaks off easily and requires repair.Would buy again.

Does not come with adjustable knob on the pcb. It's very bright and easy to read. Good value!!

J'en ai installé 2 sur 3 il y a plus d'un mois. Fonctionnent très bien en 12 volt DC. Affichage clair et facile à lire.

Ils fonctionnent tous mais n'ont pas tous la mème précision qui varie de 0.2v

Je vais l'installer dans ma roulotte. L'article est conforme a la description.