Feature: 1. ACCURATE DETECTION: With a LND712 Geiger counter tube, this nuclear radiation detector provides precise ??, ??, ??, and X ray radiation measurements with an accuracy level of ?& 1825;?20%. 2. CUSTOMIZABLE ALARM: You can set and adjust dose rate and dose values to ensure safety with the alarm functions and independent switch, featuring sound, vibration or a combination of both options. 3. HD LCD DISPLAY: The radiation dosimeter features a user friendly interface that provides real time readings on a clear LCD display and automatically stores maximum values. 4. VERSATILE APPLICATIONS: Ideal for daily use (imported products, jewelry), medical environments (radiology, pharmaceuticals), industrial settings (nuclear power plants, metallurgy), individual protection, and more. 5. CONVENIENT AND PORTABLE: With a 2200mAh built in battery, this radiation monitor is easy to carry and store and is designed to withstand harsh environments and heavy use. Specification: Item Type: Radiation Detector Material: ABS Model: GM300C Power Supply: 1 x 18650 lithium ion battery 2200mAh (built in) Radiation Types: ?? ?? ?? X ray Detector Type: US LND712 Geiger counter tube Measurement Range: 0.01-1000??Sv/h Energy Response: 40KeV-1.5MeV Measurement Accuracy: Better than ??20% Measurement Units: ??Sv/h, mSv/h, mR/h, CPS, ??Sv,mSv Alarm Function: Can set an alarm threshold Alarm Method: Sound, vibration (with independent switch) Accumulated Time: 1-9999 minutes can be set Accumulated Dose: Automatic accumulation, resettable manually Maximum Hold: Automatically hold the maximum value Curve Observing: The latest one hour curve chart, and it automatically calculates the maximum and average values Measurement Modes: Fast and smooth modes Languages: Chinese and English menu Operating Temperature: -20?? to +60?? Operating Humidity: 5%-95%RH (non condensing) Charging Time: