Do you want to know the hot spots in your home? You might be surprised to learn where they are. The EMFs emitted by your refrigerator or microwave are a nasty surprise. Test your own cell phone. The FW Bell 4180 Gauss Meter detects and measures low frequency magnetic fields. It has very high accuracy (within 2%), and it is easy to use with a large 3.5” LCD screen and labeled push button controls. It is a self contained handheld design.