HT20 digital gauss meter can be used to measure the DC magnetic field, AC magnetic, radiation, magnetic fields and other types of magnetic induction intensity. The Portable Gauss Meter can carry a wide range, easy to operate, LCD clear. Technical Specifications Measuring range: 0 ~ 200mT (millitesla) ~ 2000mT (millitesla) Basic error: ± 2% ± 3 digits (1000mT less) Resolution: 0.1mT (millitesla), 1mT ( millitesla) measured magnetic field: DC magnetic field (static field) Ambient temperature: 5 ℃ ~ 40 ℃ Relative Humidity: 20% ~ 80% (non-condensing) Power supply: one 9V battery Dimensions: 160mm × 88mm × 36mm Instrument Weight: 300g Display: 3 1/2 LCD Display unit: mT (milli Tesla) Remarks: 1mT (millitesla) = 10Gs (Gaussian)