I needed a voltmeter to check why the dome light in my Jeep isn’t working. Is it because the light is bad, or is it because the wires going there are dead?

Last night I went on Amazon and found this device:

Less than 18 hours after I ordered it, today, on a Sunday afternoon, I had it delivered to my door. The entire bill was $12.90. That includes tax, delivery (I’m on Prime, so I don’t pay delivery separately), and the device.

It measures not only AC and DC voltage, it measures current, resistance and temperature, it can be used to test transistors and diodes, and you can test continuity.

This device was made in China.

How on earth can somebody design a complex device like this, manufacture it, ship it all the way from China, sell it on Amazon and give Amazon a profit, ship it to me in less than 18 hours, pay tax, all on $12.90.

That to me is magic.

Now to test my dome light.