It is a GREENLEE "GT-11 Voltage Detector" "50-1000V AC CAT IV" It has a little plastic encased metal nib on the end and it looks like a fat marker. You just stick it in an outlet and it lights up and beeps to indicate a current. There is no read-out, it just detects. Anyway, an outlet of mine hasn't been powering things up. The detector was kind of old, but I just opened it today. Because of all this I have attempted to ensure it works properly - I put it into a socket, and it will go off when I put it in the right side of the socket only. I assume this is normal and that's how it worked on all the working electrical outlets in my house. So when I go up to test the 'broken' socket, the voltage detector goes off about 10-15 mm away from the outlet. It will do this for either hole (left or right side), as where with my working outlets in the house it only works when put in the right hole, and it has to be fully inside it. Any explanations as to why the outlet that wont power up anything is detectable farther away? Doing all this, I brush up against my 10 year old TV, which is on, and the voltage detector goes off. A few minutes of experimentation- it only goes off when TV is on it is detectable about 1.5 feet from the front of the TV, and the range grows smaller as you go behind the TV screen. Range diminishes to about 3 inches from all sides of the tv screen once you are on the same plane as the screen. After moving the detector about 3 inches behind the tv screen, the voltage meter no longer goes off, and doesn't anywhere else Behind the TV. So the range directly in front of the screen is quite far, grows increasingly smaller until I am on the same 2d plane as the TV screen, then goes away behind the TV. Why is anything detectable at all? what is being detected? some increased electrical voltage in the air from my TV? The new LCD isn't 'detectable' by this tool period, just the old tv. I also found it weird that some wires, or more like cords (to my vacuum, the first half of my laptop charger- as in the part of the cord that goes from the socket to the power converter block) are 'detectable' when the tip is pressed against the insulated cord/wire. It must be touching it, but the cords are fully covered, and its detectable anywhere along the length of the cord. The cord to my toaster, when on, is not detectable... Help me understand this PF? I am fairly positive its not a matter of the detector going haywire. I don't understand some of these detections though..