1. 5V power supply, or 1.5V 3 batteries 1.2V 4 batteries, current: 30mA - 12mA 2. Used to detect gamma rays from 20mR or h-120mR or h and 100-1800 off Variation or spot or cm 2 of soft beta rays. 3. Sound and light alarm Compatible with for 4. Interrupt output interface, through which you can connect The microcontroller is then displayed on the LCD. 5. Support most Geiger tubes: M4011, -5, SBM20, J305, etc. (Can support Geiger tube 330-600V working voltage).Support computer (PC) data acquisition, Matlab analysis and processing Detect nuclear radiation work (copy below to your browser to watch): https: or or v.youku.com or v_show or id_XNzI3MTU2NzQ0.html Customer recording video with our Geiger counter: https: or or v.youku.com or v_show or id_XOTE4ODIyNTIw.html compatible: (recommend for R3, or any other arbitrary with 5V and external interrupt ) Internet Downloadable: SPI Example for Radiation Logger Logger Radiation can be used as a host computer software to build a radiation monitoring station. Product Description: Name: Radiation Detector System Geiger tube parameters: Technical parameters Diameter: 100.5mm Total length: 902mm Starting voltage: Less than350V Recommended working voltage: 380V Minimum platform length: 80V Maximum platform slope: 10percent or 80V Limit working voltage: 550V Maximum counting rate: 25 times or min : 1 x 10 9 pulses Medium temperature: -40-55 Material file: Cloud Storage: https: or or drive..com or folderview id=0B9itH-BnWE5sY2JGRkM4MWhSYkEand=sharing size: 10.8 x 6.3 x 2cm Material: ABS colour: blue Package Contents: 1 x DIY Geiger Counter Kit 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.