Please note that the listed products are produced and sold abroad and are subject to the laws of their country of origin. This is a high-quality nuclear radiation detection module kit, which can directly measure nuclear radiation by plugging it in. For detecting gamma rays from 20mR/h-120mR/h and soft beta rays from 100-1800 variable/point sc&13217; You can try. Features: 5V power supply, or 3*1.5V battery; 4*1.2V battery, current: 12mA - 30mA. Used to detect gamma rays of 20mR/h-120mR/h and 100-1800 off variables/point sc&13217; with sound alarm and light alarm functions. Interrupt output interface, through which it can be connected to the microcontroller and then displayed on the LCD. Supports most Geiger tubes: M4011, STS-5, SBM20, J305 and other specifications: Name: Assembled Radiation Detector Module Material: Printed Circuit Board Product Size: 110 * 48 * 20mm / 4.33 * 1.89 * 0.79in Package size: 175 * 95 * 115mm / 6.89 * 3.74 * 4.53 inches Package weight: 200g / 7.05 ounces Package list: 1 * Assembled radiation detector module