Features1Function: The Geiger counter kit module is used to detect 20mR/h to 120mR/h Ray and 100 to 1800 soft deviation variable, point of ray. 2Supporting Computer Data Acquisition: The Geiger counter module supports computer, PC data acquisition, for Matlab analysis and processing. 3Most Geiger Tubes Compatible: This Geiger counter module support most Geiger tubes M4011, STS 5, SBM20, J305, etc. 4With LCD Display: Interrupt output interface, through which you can connect to the microcontroller, and then display on the LCD. 5Audible and Visual Alarm: This Geiger counter meter kit has built in audible and visual alarm and its working voltage is 380V?550V.SpecificationItem Type: Geiger Counter Kit ModuleMaterial: Circuit boardGross Weight: 156g/5.5ozProduct Size: 10.8x6.5x4.7cm/4.3x2.6x1.9inPurpose: Nuclear radiation detectionPlug: USBGeiger Tube Parameters:Technical Parameter Diameter: 100.5mmTotal Length: 90 2mmStarting Voltage:1 x 10 ^ 9 pulsesMedium temperature: - 40 to 55 Package List1 x Host 1 x USB Cable 1 x Geiger Tube