Feature 1Built in Memory: Portable geiger counter has built in memory, and some data such as accumulated dose value, dose rate alarm threshold and dose alarm threshold will not be lost after power failure. 2Power Supply Mode: Giegermeter radiation detector has two power supply modes, which can be installed with 3 AAA batteries, or Type c power supply, button battery included: CR1220, and has dual alarm functions. 3Multi Screen Display Function: Can adjust the alarm threshold arbitrarily, switch between Chinese and English, screen backlight, real time dose rate curve display function, etc. 4Function Settings: Geiger counter radiation detector can be set for sound, backlight, language, time and date, calibration factor, clear dose. 5Wide Application: Nuclear radiation detector can be used in home improvement radiation detection, irradiation processing enterprises, health and epidemic prevention, radiotherapy, nuclear laboratories and other scenarios.Item Type: Nuclear Radiation DetectorMaterial: ABSProduct Size:Approx. 116 x 60 x 25mm / 4.6 x 2.4 x 1.0inUSB: 5VLanguage: Chinese and EnglishMeasuring Range: 0.1uSV/h-10mSV/hDose Range: 0.00Sv - 10SvSensitivity: >1cps/sv/h (under Condition Co60 Source)Energy Response: 48keV-1.5MevRelative Error: <10% (at 1mSv/h)Power Supply: 3 x AAA Batteries (Delivered Without Batteries)Time recording battery (built-in battery) : Button battery CR1220, 40mAhPower Consumption: <150mWTemperature Characteristics: -10C to +50C .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 xNuclearRadiationDetector1 x English User Manual1 x USB Cable1 x Crossing ScrewdriverNoteShips without battery.