DT-1130 50Hz-2000MHz Digital LCD Electromagnetic Radiation Tester EMF Nuclear Gamma Microwave Exposure Detector High Quality ABS Case Material Frequency range: 50Hz~2000MHz Color: Black ; Package Contents:1 x DT-1130 Electromagnetic Radiation Detector with instructions Batteries: 1 x 9V (Not included) Measurement time intervals: 0.4 seconds