Features: 5V power supply, or 3 x 1.5V battery; 4 x 1.2V battery, current: 30mA - 120mA. For the detection of 20mR/h-120mR/h of gamma rays and 100-1800 off variables/points of the soft beta ray. Equipped with sound alarm and light alarm function. Interrupt the output interface, through this interface can be connected to the microcontroller and then displayed on the LCD. Supports most of the Geiger tube: M4011, -5, SBM20, J305, etc. (the 330-600V operating voltage of the Geiger tube can be supported). This is a set of fine quality nuclear radiation detect module unassembled parts set, plug it and you can directly measured nuclear radiation. For the detection of 20mR/h-120mR/h of gamma rays and 100-1800 off variables/points of the soft beta ray. You can have a try. Support the computers (PC) data acquisition, Matlab analysis and processing. Material: PC+Metal Color as shown Compatible with: (recommended UNOR3, or any other arbitrary with 5V and external interrupt ) Internet can be downloaded: S-PI example for Radiation Logger Logger Radiation can be used as the host computers software to build radiation monitoring station. Specifications: Geiger tube parameters: Technical parameters diameter: 100.5mm Total length: 902mm Starting voltage: Less than 350V Recommended operating voltage: 380V Minimum plateau length: 80V Maximum plateau slope: 10%/80V Extreme operating voltage: 550V The maximum count rate: 25 times / min Medium temperature: -40 to 55 Item size: 108 x 63 x 20mm / 4.25 x 2.48 x 0.79in Item weight: 100g / 3.53ounce Package Contents: 1 x Unassembled Radiation Detector Module Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.