This EMF/ELF Meter (Gauss Meter is used to measure the electromagnetic field of extremely low frequency (ELF). The reading in milliGauss (mG) and microTesla (µT) are switchable anytime by simply press the button. Application: It is capable of measuring the electromagnetic field radiation intensity that is produced from electric transmission equipment, power line, microwave oven, air conditioner, refrigerator, computer monitor, video/audio device and so forth. Features: MADE IN TAIWAN Data hold (HOLD), maximum (MAX) hold function Range display 20/200/2000 Low battery Overload indicator "OL" Specifications Display : 3-1/2 digits LCD with 1999 maximum reading Measuring Range : 200/2000 mG ,20/200 µT Resolution : 0.1/1 mG or 0.01 / 0.1 µT Frequency response : 30Hz to 300Hz Sensor : Single Axis Accuracy : ±(2.5% + 6dgt) at 50Hz/60Hz Sample rate : 2.5 times per second Over load : LCD Display "OL" Power Supply: 1 x 9V Battery(included) Battery Life : Approx.100hours Operating environment : Temperature: 5~40°C Humidity : < 80% RH Storage Environment : Temperature : -10~60°C Humidity :