Very easy to read and interpret
I have the model CT101 which adds GFCI testing, but the basic receptacle testing on that model is the same as this one.  The arrangement and brightness of the indicator lamps on this tester are excellent.  They are easily seen in a bright room.  When wired correctly, you see two lights across from each other, with "OK" stamped into the plug directly in between the lights.  So, it's very clear when the outlet is correct.  If you have any other pattern, you know there's a problem.  Just check the key printed around the plug to sort out what the problem is.<br /><br />It's easy to use and gave me peace of mind about the outlets in my old home.
Rating: 5 stars