Makes repairing incandescent light strings not just possible but potentially quick. While the trigger-method hasn't worked for me yet, I've fixed 6 strings in less time than ONE used to take. The beeper is fairly effective in finding where the voltage stops... unless there are too many stops. The bulb tester is a life saver in determining if you actually found the problem. The frustration mounts when a string has done a cascade failure and most or all the bulbs are bad, but you still reach that "throw it away" decision much sooner with much less suspicion that you were one bulb away from success. If you have to deal with more than a couple strings each year and you don't have one of these, you are crazy. Or will be.
Verified purchase: Yes | Condition: New
It sort of works sometimes I thought one valuable feature was the bulb tester but it only works sometimes. I tested a bulb that was good and it did not light when put in tester. I put it back in set and it was a good bulb lit just fine
Verified purchase: Yes | Condition: New
The bulb puller and tester worked well. Fuse tester and voltage meter seemed to work well also, but I never could get the two non-lighting strands on my pre-lit tree to work. Lots of good written information was helpful. According to that, I had too many missing bulbs on those strands for too long, so the whole strand was done.
Verified purchase: Yes | Condition: New
What is lacking in your instructions is for the user to insure that the plug on the string of lights is plugged in (it's not polarized) so that the hot wire goes to the light filament and not the return wire. Since the beeper only works off of a static charge, if the plug is inverted the machine will NOT beep at any lights since the ground wire has no charge. If they are not aware of this they have a 50% chance of getting the device to work.
Verified purchase: Yes | Condition: New
Bought this because of multiple problems with at least ten strands of lights. This device saved me countless hours tracking down the many issues. A fantastic assistant! It made short work of my issues. All of the features worked flawlessly. I was unlucky to have no problem solved by the "shunt" approach, so I do not know if that feature works effectively. All of the other tests/checks worked. It is well worth the cost.
Verified purchase: Yes | Condition: New
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