It detects and shows the level of radioactivitiy to your smart phone. The download of the necessary app is required. You can just place this device near to the suspicious object, and link to your phone. Then it will show the level of radioactivities to your phone. 

Bluetooth interface,

Easy connect & check, 

Quick and accurate data, 

1.5 v x 2 ea (AAA battery), or Micro USB power (battery not included) 

Supports Android or Apple

Radiation measurement : Gamma, X-Ray, 

Survey meter : 0.05-200 uSv/h, 

Measurement error : less than +-15%,

Sensor type : Semiconductor sensor, 

Size : 58x58x18.5 mm,

Weight : 30 gram (without battery), 

User interface : Bluetooth Android & IOS, 

Supports Android 4.2 or later, IOS 8 or later 

Designed by FT Lab in Korea, assembled in China.