They’re inexpensive and easy to use, and they help keep you safe when doing DIY electrical work. Solution: Test. Use. Verify. First, test the tester by holding it to a known live circuit, like a ...

Right now on Amazon, it’s $13 — 48% off the $25 original price. Setup is quick: plug it in, open the Alexa app on your phone, and you’re ready in minutes. No separate smart home hub is required.