Features: High accuracy: Built in high sensitivity energy compensated - Geigers counter, measurement accuracy up to 0.01μSv/h, error ≤ 10% (real times measurement) ≤ Retain 3% (average measurement). Multi-function: The nuclear radiation detector can measure the dose equivalent of β-rays, γ-rays and X-rays. If the measured value exceeds the threshold level, an alarm will be issued. Two measurement modes: There are real-times measurement and average measurement, so you can check the real-times measurement value in emergencies and the average value in daily life. Backlight: Equipped with a large backlight LCD display, the measured values can be seen at a glance. And the real-times value and the average value can be displayed in one screen and monitored at the same time. Portable and easy to use: With its compact size and lightweight design, you can be easily operated with one hand without any troublesome set up. Specifications: Material: Plastic Color: As The Picture Shows Package Weight: approx.266g Size: approx.70x135mm/2.75x5.31in (More Size Detail, Please See Photo.) Package Includes: 1Pc Nuclear Radiation Detector note: Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!