The MagneSpot XR1000 Kit is an intelligent reference point locator that gives users complete confidence before drilling, cutting, or any other task you may previously had to do blindly. Operating the XR1000 is simple! Just place the XR1000T Transmitter exactly on the point you need to find. On the other side of the wall, ceiling, or floor, the XR1000R Receiver will indicate to you which direction to move using its four red LED arrows. When you are perfectly lined up with the Transmitter, all 4 Arrows illuminate. The XR1000 is accurate up to 1/2″ & works at distances up to 3 to 4 feet away! There are 8/32″ threads on the bottom of the transmitter, making it compatible w/Labor Saving Devices Creep-Zip or Klein Tools fiberglass rods & others w/8/32″ threads to help in hard to reach areas. Both Transmitter & Receiver are sporting the MagneSpot red logo. For Low or High votage: Voice/Data/Video/Security/Power, CATV, CCTV, MATV (Master Antenna) & SAT TV (Satellite Dishes) etc!