Onyx Advanced Geiger Counter Onyx - Personal Radiation Monitor Pancake detector 2-inch(7.1cm) diameter for broad sensitivity to alpha, beta, gamma and X-radiation. 32-bit ARM Processor for rapid processing of data and power to communicate in multiple ways 128x128 color OLED (Organic Light Emitting Diode) display 6-button capacitive-touch-array user interface (UI)