Feature 1MULTIPLE FUNCTIONS: With sound and light indication function, real time dose rate, average dose rate, cumulative dose rate, trend graph and other functions. 2CLEAR DISPLAY: Using small organic light emitting diode screen display, the measurement results are clearly displayed, which is easy to read. 3EXCELLENT PROCESSOR: The nuclear radiation detector adopts for ARM processor, which has fast calculation speed and powerful processing function. 4DETECTABLE RADIATION: This nuclear radiation detector can detect x rays, rays, rays, with high accuracy, which is reliable and efficient in operation. 5MULTIPLE USAGES: Can be used for radioactive dose detection of marble, antiques, medical equipment and various minerals, with wide applications.Item Type: Nuclear Radiation DetectorMaterial: Acrylic, ResinFor Geiger Tube: J321 (Compatible with M4011)Screen Resolution: 128 x 64MCU: For ARMDisplay Accuracy: 0.001usv/hDetection Display Range: 0-9999usv/hPower Supply: USB 5V, 500MAJ321 Pipe Specification: Start Voltage: <350VRecommended Working Voltage: 380VMinimum forPing Length: 80VMaximum forPing Slope: 10%/80VExtreme Working Voltage: 550VMaximum Background Count Rate: 25 counts/minLife: >1 x 10 pulsesDetection: x rays . Package List1 x Radiation Detector1 x USB Cable Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.