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 days (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: <10s  Typical power consumption: 13mW  Alarm threshold deviation: -17% to +25%  Working temperature: -20℃ to 50℃  Working humidity: ＜95%RH no condensation   Item size: 120 * 65 * 25mm / 4.72 * 2.56 * 0.98in  Item weight: 127g / 4.48ounce  Package size: 201 * 110 * 65mm / 7.91 * 4.33 * 2.56in  Package weight: 400g / 14.11ounce    Packing List:  1 * Electromagnetic Radiation Detector  1 * Rope  1 * Instruction  1 * USB Cable  1 * Storage Bag