This EMF/ELF Tri-Axis Gauss Meter is a scientific instrument for measuring electromagnetic fields (EMF) with extremely low frequency (ELF). The reading in milliGauss (mG) and microTesla (µT) are switchable anytime with just one press of a button. All parts are of professional quality and Made in Taiwan, it accurately measures EMF pollution in your environment. Features: Uses three internal orthogonal sensors Designed to measure magnetic field radiation levels around power lines, home appliances and industrial devices Display micro Tesla (µT) or milli Gauss (mG) units Data hold (HOLD), maximum hold (MAX) and minimum hold (MIN) functions Auto range or Manual range 500 data sets data logging capacity with memory size Real Time and Calendar function Low battery indication Over load display ("OL") Auto power off function Made in Taiwan Specifications: Display: 4 digits Triple LCD Display maximum reading 9999 Range: 20/200/2000 mG , 2/20/200 µT Resolution: 0.01/0.1/1 mG or 0.001/0.01/0.1 µT Frequency response: 30 Hz ~ 2000Hz Sensor: Triple Axis (X, Y, Z) Accuracy: 20mG ±(3.0% + 30 digits) at 50Hz/60Hz or 3.0µT ±(3.0% + 30 digits) at 50Hz/60Hz Overload: LCD display "OL" Sample rate: 2.5 times per second Battery: 1 x 9V Battery (included) Battery Life: approx. 100 hours Operating Temperature: 5~40°C (41~104°F) Operating Humidity: < 80% R.H. Storage Temperature: -10~60°C (14~140°F) Storage Humidity: < 70% R.H. Dimension (Meter) L x W x Thickness: 182 x 78 x 30mm Weight: Meter: 184g (without battery) Whole Set: 447g Set Includes: 1 x EMF Tri-Axial EML/ELF Meter 1 x 9V battery 1 x Carrying bag 1 x English Instruction Manual Standard Factory Package