Features: Simple and easy to operate, achieve multiple modes of transformation easily. Handhold instrument design, built-in high-performance batteries for easy to carry around with you. GM counter tube compensated, improved energy response. High detection sensitivity, especially for environmental radioactivity monitoring to detect traces of nuclear radiation. Use built-in probe type, the effective protection of the probe is not damaged. Retain count sound, you can quickly determine the radiation situation surrounding environment, to quickly locate the exact location of radiation sources. Anti-interference ability, capable of reliable operation in complex electromagnetic environments. Instrument display accuracy up 0.001μSv/h(CPM mode is up to 1CPM). Widely used, can be used in the home environment, daily necessities, mineral rocks, decorated stone and other radioactive detection. Note: 1 min automatic shut off LCD backlight LED light, press either button to restore LED backlight.