Features: The measurement of electromagnetic rapid response and simple operation Applications: Radiation Monitoring and found that low frequency (ELF) electromagnetic fields in units of mG (milligauss) * Note: Do not measure the static magnetic field of permanent magnets and other parameters: Range: 0.1-199.9mG Accuracy: ± (3% rdg +3 dgt) at 50Hz/60Hz Frequency response: 30HZ-400Hz max hold, data hold function Battery: 9V Over range: Display OL Sampling rate: about 2.5 times / sec temperature and humidity range: Operation: 0 ° C -50 ° C (32 ° F-122 ° F) Below 80% RH (no condensation) Storage: -10 ° C-60 ° C (14 ° F-140 ° F) Below 70% RH (no condensation) Dimensions and Weight: 135 (L) x55 (W) x35 (H) mm (5.31 "x2.17" x1.38 ") ? Approximately 150g (0.33 Ibs)