Feature:1. 3 in 1 Testing: Comes with 0.0055cGy/h wide measuring range of radioactive substances, the Geiger counter can detect hard , and X rays.2. Better Display: Designed to have high accuracy and high sensitivity, the tube tester supports clear display on the test result, easy to read.3. Flexible Using: Can be widely used in detecting domestic nuclear radiation, industrial nuclear radiation, treatment nuclear radiation and more.4. Good Materials: Adopting premium glass and stainless steel materials, the Geiger counter tube is not easy to malfunction and also very durable.5. Simple Carrying: Light in weight and compact in size as well, the Geiger Miller tube is very convenient to carry for both indoor and outdoor use.Specification:Item Type: Geiger TubeMaterial: Glass, Stainless SteelMeasurement Object: X rays, y rays, hard Belta rays. Flat Slope: 0.3%/v within the range of 380-450. Measurement Range: 0.005-5cGy/hEnergy Response: Within 30%, 50KeV-3MeV. Accuracy: 0.01uSv/hStarting Voltage: 350VDischarge Voltage: 550VProduct material: Stainless steel cathode. Measurement temperature: -20-55Lifetime: >1 x 10^10 pulses. .Package List:1 xGeiger Tube