In Japan, the only country in the world to have been bombed, the population is very attentive to the presence of radiation in the world around them. With the introduction of the Geiger Smart Lab SMTGEG4S mobile Geiger counter, measuring and monitoring radiation dose accumulation has become easier. The device is compatible with smartphones on iOS and Android, and is connected via a headphone jack. The product weighs only 6 grams, dimensions: 10×47 mm. The device does not pull the bag and does not take up extra space. It can be put in a wallet or cosmetic bag and carried with you. Smart Lab SMTGEG4S is capable of detecting gamma rays, x-rays and the accumulated dose. The error rate does not exceed 30%. The gadget has a good range – from 0.1 to 200 μSv / h. Data analysis is performed by proprietary software on a smartphone in seconds. A good gift for those who want to appreciate the \So far, the tiny Geiger Smart Lab SMTGEG4S is only sold in Japan for about $ 40.