This EMF meter set will give you the tools to effectively measure both high frequency (HF) and low frequency (LF) electromagnetic radiation in your home or any other environment. The MG-300 meter is used for measuring EMF fields of extremely low frequency of 30 to 300Hz, while the HF-B3G is designed for measuring and monitoring Radio Frequency (RF) electromagnetic field strength, and is capable of measuring the frequency range of 50MHz to 3.5GHz. Specifications (MG-300) - Display: 3-1/2 digits LCD, maximum reading 1999 - Range: 200/2000 mG,20/200?T - Resolution: 0.1/1 mG or 0.01/0.1 ?T - Frequency response: 30Hz to 300Hz - Accuracy: ± (2.5%+6dgt) at 50Hz/60Hz - Over load: LCD display "OL" - Sample rate: 2.5 times per second - Battery: 9V NEDA 1604, IEC 6F22 or JIS 006P - Battery life: Approximate 100 hours - Operating temperature & humidity: 5?to 40?,below 80% RH - Storage temperature & humidity: -10? to 60?, below 70% Specifications (HF-B3G) - RF range: 38mV to 20V/M - Frequency range: 50MHz to 3.5GHz - Sensors:Triple Axis (X,Y,Z) - Manual data memory (Max & AVG) records - Calibration factor: Alarm and Clock settings - Display type: Liquid-crystal (LCD), 4-1/2 digits maximum reading 19999 - Measurement method: Digital, triaxial measurement - Directional characteristic: Isotropic, triaxial - Measurement range selection: one continuous range - Display resolution: 0.1mV/m, 0.1µA/m, 0.001µW/m2, 0.001µW/cm2 - Setting time: typically 1.5s (0 to 90% measurement value) - Sample rate:1.5 times per second - Audible alarm: Buzzer - Units: mV/m,V/m,µA/m,mA/m,µW/m2, mW/m2,µW/cm2 - Display value: Instantaneous measured value, maximum value,average value, or maximum average value - Battery life: Approximately 15 hours