Features:  5V power supply, or 3 * 1.5V battery; 4 * 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 and light alarm.  Supports most of the Geiger tube: M4011, STS-5, SBM20, J305, etc. (the 330-600V operating voltage of the Geiger tube can be supported).  Support the computers (PC) data acquisition, Matlab analysis and processing.    Detection of nuclear radiation work (copy the following link to the browser to watch):  Http://v.youku.com/v_show/id_XNzI3MTU2NzQ0.html    Customers using our Geiger counter to record the video:  Http://v.youku.com/v_show/id_XOTE4ODIyNTIw.html    Compatible with:  (recommended UNOR3, or any other arbitrary with 5V and external interrupt INT)  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:  Material:  electronic component   Geiger tube parameters:  Technical parameters diameter: Φ10±0.5mm  Total length: 90±2mm  Starting voltage: < 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 * 63 * 20mm / 4.25 * 2.48 * 0.79in  Item weight: 100g / 3.53ounce  Package size: 120 * 80 * 40mm / 4.72 * 3.15 * 1.57in  Package weight: 150g / 5.29ounce     Packing List:  1 * Unassembled Radiation Detector Module Set