Careshine Smart Geiger Radiation Counter nuclear Gamma, X-ray Detector for iOS Android High sensitivity measurements- using a precise signal measurement technology. Real time display of measurement results- Use the Semiconductor sensors, measurement of radiation (Gamma, X-ray). Easy to carry and convenient-World smallest geiger counter (30mm) Compact design, Low power consumption, No External Battery You will get 1 Smart Geiger Counter and our 1 year warranty after-sales service.