Fangrui Product Details 1. 5v Power Supply, Or 1.5v 3 Batteries; 1.2v 4 Batteries, Current: 30ma - 12ma 2. Used To Detect Gamma Rays From 20mr/h~120mr/h And 100~1800 Off Variation/spot/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): Http: //v.youku.com/v_show/id_xnzi3mtu2nzq0.html Customer Recording Video With Our Geiger Counter: Http: //v.youku.com/v_show/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: Radia