Feature 1Radiation Detection: The nuclear radiation detector is suitable for the detection of 20mR/h120mR/h of gamma rays and 1001800 off variables and points of the soft beta rays. 2Upgraded Components: Reasonable circuit layout design, interrupt output interface, which can be connected to and displayed on LCD. 3Audible and Visual Alarm: Counter kit has visual and sound indication of the radiation and can be used as detector of dangerous radiation levels or radioactive materials in your environment. 4DIY geiger counter kit support computer (PC) data acquisition, Matlab analysis and processing. Perfect for MCU software developers that just want to drive geiger tube for their own software. 5Complete Parts: Kit includes all components needed to build a working geiger counter, including a circuit board, sensitive geiger tube, acrylic board, wiring and battery boxItem Type: Unassembled GeigerCounterDIYKitMaterial: Electronic boardGross Weight: 310g / 10.9ozGeiger Tube Parameters:Technical Parameter Diameter:100.5mm / 0.40.02inTotal Length: 90 2mm / 3.50.1inStarting Voltage:<350VRecommended Working Voltage: 380VMinimum Platform Length: 80VMaximum Platform Slope: 10%/80VLimit Operating Voltage: 550VMaximum Counting Rate: 25 times/minuteService Life:>1 x 10 pulsesMedium Temperature: - 40~55 Plug: USBBattery: AA 1.5v dry battery (3pcs required) (shipped without battery) .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List76 x Accessories1 x Electronic Board1 x Acrylic Board1 x Battery Box1 x USB Cable2 x Wiring1 x GeigerTube