Feature: 1. Function: The Geiger counter kit module is used to detect 20mR/h to 120mR/h γ Ray and 100 to 1800 soft β deviation variable, point of ray. 2. Supporting Computer Data Acquisition: The Geiger counter module supports computer, PC data acquisition, for Matlab analysis and processing. 3. Most Geiger Tubes Compatible: This Geiger counter module support most Geiger tubes M4011, STS 5, SBM20, J305, etc. 4. With LCD Display: Interrupt output interface, through which you can connect to the microcontroller, and then display on the LCD. 5. Audible and Visual Alarm: This Geiger counter meter kit has built in audible and visual alarm and its working voltage is 380V‑550V. Specification: Item Type: Geiger Counter Kit Module Material: Circuit board Gross Weight: 156g/5.5oz Product Size: 10.8x6.5x4.7cm/4.3x2.6x1.9in Purpose: Nuclear radiation detection Plug: USB Geiger Tube Parameters: Technical Parameter Diameter: 10±0.5mm Total Length: 90 ± 2mm Starting Voltage:<350V Recommended Working Voltage: 380V Minimum Platform Length: 80V Maximum Platform Slope: 10 percent 80V Limit Operating Voltage: 550V Maximum Counting Rate: 25 times/minute Lifetime:>1 x 10 ^ 9 pulses Medium temperature: - 40 to 55 ℃. Package List: 1 x Host 1 x USB Cable 1 x Geiger Tube