$0.5 Aliexpress Gadget - mini digital voltmeter

0.28 Inch Two-Wire 2.5-30V Digital Red Display DC Voltmeter Adjustable Voltage Meter

[tubegor]

Caliper with AAA battery is a good idea. Doesn't look nice, but always ready for use. The times when battery was empty is over. I also rebuilt my caliper, but with a push button switch. 👍

[tomasotreasaigh]

Great vid, does the 3 wire version offer anything extra?

[GabbeeAnimator]

Yeah I have 50 cents I can afford it I can buy 10 of these

[daveyk]

Ffs bro ya well behind I had some off Ebay 100 years ago 😂😂😂😂 theres few different colours to

[MiamiMillionaire]

I bought this device a few years ago, but i paid a little more (it always worked well)