Feature: 1. MEASURING OBJECT: This Geiger counter tube can be used for measuring X rays, γ rays, and β rays, which is convenient and practical. 2. GLASS MATERIAL: The Geiger counter tube is made of excellent glass material, with high transparency and good corrosion resistance. 3. FOR DIY PROJECTS: This glass Geiger counter is suitable for various nuclear radiation detection application, and suitable for DIY projects. 4. COMPACT SIZE: The radiation detector tube is compact and lightweight, easy to install and carry, convenient to use anytime, anywhere. 5. RELIABLE OPERATION: With fine workmanship and strict testing, this Geiger counter tube has stable performance, ensuring reliable operation. Specification: Item Type: Geiger Counter Material: Glass Slope: ≤0.3%/V in the range of 380-450 Measurement Range: 0.005-5 cGy/h Energy Response: Within ±30% (50KeV-3MeV) Accuracy: 0.01uSv/h Measurement Temperature: -20℃-55℃ Lifespan: >1x10^10 Pulse. Package List: 1 x Geiger Counter