Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: How can they sell these things and get away with it?
Review: I bought this Greenlee GT-11 voltage detector and was very dissappointed. I probed a live outlet and got no reaction until I inserted the tip directly into the outlet ( it only sounded the alarm on one side of the outlet and not the other ). I then tapped it on my hand and the alarm sounded?!?! I have had other voltage detectors that react when placed near the electrical source...just like you would expect. The Greenlee GT-11 is just plain dangerous ...you really never know if the line is live or not.
