Features: Can simultaneously test electric and magnetic field radiation. Sound and light alarm, when test result exceeds the safe value, the instrument will automatically alarm. Data locking, one button locking of radiation values. digital displays numerical values for easier reading. Radiation assessment, reminding you whether the radiation value is safe. Fashionable design, convenient handheld operation, convenient portability and on site measurement. Specifications: Material:ABS Size:Approx.60mm/2.36''x30mm/1.18''x125mm/4.92'' Package Includes: 1x Electromagnetic Radiation Tester note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.