[High Detection Performance] - Geiger counter nuclear radiation detector with built-in GM sensor, fast response time and high accuracy, able to detect Gamma, Beta and X-rays. The measure range is 0.05uSv-50mSv and the measure precision is -17%...+25% based on 137Cs. [Two Measuring Mode] - Digital geiger counter has real-time data update and timed detection function. Real time measure the dosage rate, and record the accumulate the dosage at the same time. Able to check the starts time of current dosage accumulation.It has calibrate functions. The timing measure function can be freely set within 000-999 hours,and can save the historical record information of the last 10 measurements. [Sound Flashing Smart Alarm] - Enter the alarm setting option to set the dose rate alarm value.Whether the detector screen is in sleep state or in operation,the radiation dose detected exceeds the alarm threshold,the radiation monitor will automatically alarm. And emit a loud sound and flashing screen. The alarm threshold and metering alarm threshold all can be freely set. [Multifunctional Geiger Counter] - Handheld nuclear radiation detector with high sensitive Geiger Counter sensor, clear page and easy operation, has other various setting, such as delete setting, sound setting, system clock setting, sleep setting and unit setting & language change [Application Areas] - Widely used in the environment where existing ionize radiation environment, human body accepted radiation dosage supervise and protection, such as family decoration, radiation shining manufacture enterprises, nuclear lab, nuclear station, building materials, petroleum chemical, geology general investigation and