The free ones can be "iffy". If you have one, NEVER use it to measure anything higher than the 120VAC coming out of your wall socket.
I've seen videos and magazine articles of these things going BOOM when used on 480VAC, well within it's ratings. Not that any electrician working with 480 would use such a cheap tool to measure it, but.......
I bought one of their new Ames brand meters, and it's pretty nice. It's about 75% "as good" as my Fluke, and it was one-fourth the price!
I've seen videos and magazine articles of these things going BOOM when used on 480VAC, well within it's ratings. Not that any electrician working with 480 would use such a cheap tool to measure it, but.......
I bought one of their new Ames brand meters, and it's pretty nice. It's about 75% "as good" as my Fluke, and it was one-fourth the price!