This product is one small type high sensitivity radiation dosage alarm device, mainly used to monitor the X, β and γ rays. It has the characteristics such as high sensitivity and accurate measurement. Widely applied in the environment where existing ionize radiation environment, human body accepted radiation dosage supervise and protection, such as family decoration, radiation shining manufacture enterprises, hygiene, nuclear lab, nuclear station, building materials, petroleum chemical, geology general investigation, used steels, industry flaw detection and others. Features: Select and use the strong performance micro processor, these make operation simple, convenient, humanization and has very strong anti-disturb capacity. Configured TFT 2.0 colorful screen, you can set parameters and see the real time data clearly. Real time measure the dosage rate, and record the accumulate the dosage at the same time. It has calibrate functions. Dosage ratio alarm threshold, metering alarm threshold all can be freely set (continue and adjustable). Able to check the starts time of current dosage accumulation. It has the timing measure function, able to freely set in 000-999 hours. It has over dosage alarm function. Able to save the history record information of the recent 10 times measurement. It has calendar clock function, able to guarantee the clock normally running after power off. Battery power continue monitored and has the battery power icon. Chinese and English menu freely . It has sensors failure reminding function (display screen indicate "Equipment already damaged"). Two alarm methods sound and flash freely assembled, and the alarm threshold able to be freely set. If test the radiation dosage exceed the set alarm value under the status that recorder starts and screen extincted then the alarm value monitor will automatically alarm. It will automatically jump to radiation measurement page. Specifications: Name: Electromagnetic Radiation Detector Material: plastics Battery: 1 * 3.7V 1500mAh battery (included) Measure range: 0.05uSv-50mSv Measure precision: -17% to +25% based on 137Cs γ Durable time: 20 (continue measure and not open pellet sound) Recharging joggle: Type-C joggle (green lamp normally lights up when recharging, extincted after fully charged) Alarm responding time td: