Feature: 1. GM COUNTER SENSOR: The detector uses GM counter sensor, which has high detection sensitivity and can detect X γ β rays without damage. 2. TFT DISPLAY: The monitor adopts TFT 2.0 color large screen, could display instantaneous value, average value and cumulative value in real time. 3. SOUND LIGHT DUAL ALARM: This meter will provide audible and visual alarm if radiation is detected, users can set the alarm value by themselves. 4. HUMANIZED DESIGN: Built in large capacity battery, which can last for up to 14 days. Chinese and English fonts can be switched at will for easy use. 5. WIDE APPLICATION: The geiger counter can be used in nuclear industry sites, nuclear power plant radiation, hospital CT radiation, iodine 131, isotope detection, bone scanning radiation, nuclear pollution detection. Specification: Item Type: Nuclear Radiation Detector Material: ABS Sensor: GM counter tube (Geiger counter tube) Measuring Range: 0.08uSv-50mSv Battery Life: 14 days (continuous measurement, screen sleep) Charging Interface: TYPE C interface (the green light is always on when charging, off when full charged) Alarm Response Time: <10s Battery: 1 x 603040 polymer lithium battery 750mAh (built in). Package List: 1 x Nuclear Radiation Detector1 x Lanyard1 x Charging Cable1 x Manual