This radioactivity detector is the one to choose if you need to make precise measurements concerning protection of the environment and our health. Using this radioactivity detector you can detect the slightest X and GAMMA rays plus BETA particles in the environment and food (e.g. game animals). It beeps for each detection and an acceleration of these beeps indicates how close the radioactive source is. The 3 figure display is in mRem/hour (from 0 to 999).