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.1 x Nuclear Radiation Detector 1 x English User Manual1 x USB Cable1 x Crossing Screwdriver