The MiniRad-D is a rugged, all-weather radiation detector that's small enough to wear on a belt, yet powerful enough to quickly locate low-level radioactive sources. It automatically calibrates to background radiation and features a single switch that puts it into audible alarm mode, vibrate alarm mode, or turns it off. The MiniRad-D uses two AA batteries to provide over 5,000 hours of battery life.  Its intuitive design makes it as easy to use as a flashlight and requires just about as much training.