This low cost portable geiger counter instantly measures levels of harmful beta, gamma, and X-ray radiations on its compressed dual scale meter. -- It features a halogen-quenched stainless steel detector, Cesium-137 beta shielded calibration source, and a range of 0-100uSv/Hr and 0-10 mR/Hr (logarithmic). -- The device measures 6" x 3" x 1.37" and operates on 1- 9V battery (included). -- Comes with a 5-year warranty
