Multi Screen Display Function: Can adjust alarm threshold randomly, switch between Chinese and English, screen backlight, real-time dose rate curve, etc. Power mode: Giegermeter radiation detector has two power modes, which can be installed with 3 AAA batteries, or Type c power supply, button battery included: CR1220, and has dual alarm functions. Built in memory: Portable Geiger counter is built in memory, and some data such as accumulated dose value, dose alarm threshold and dose alarm threshold will not be lost after power failure. Function settings: Geiger anti-radiation detector can be set for sound, backlight, language, time and date, calibration factor, clear dose. Wide application: Nuclear radiation detector can be used in home improvement radiation detection, radiation processing enterprises, health and epidemic prevention, radiotherapy, nuclear laboratories and other scenarios. Specification: Item Type: Nuclear Radiation Detector Material: ABS Product size: Approx. 116 x 60 x 25 mm to 4.6 x 2.4 x 1.0 inch USB: 5V Language: Chinese and English Measuring range: 0.1hSV/h-10mSV/h Dose range: 0.00mSv to 10Sv Sensitivity: >1cps/μsv/h (under Condition Co60 Source) Energy Reaction: 48keV-1.5Mev Relative error: <10% (at 1mSv/h) Power supply: 3 x AAA batteries (supplied without batteries), or Type C power supply, button battery included: CR1220 Power consumption: <150 mW Temperature characteristics: -10°C to +50°C Package List: 1 xNuclear RadiationDetector 1 x English User Manual 1 x USB Cable 1 x Crossing Screwdriver Note: Ships without battery.