Product Information: Measurement method: electromagnetic induction Display screen: VA reverse display color screen Maximum display: 9999 Sampling rate: approximately 0.4 seconds Measurement range: V/m: 0-9999/uT: 0-74/mG: 0-740 Resolution: V/m: 1/uT: 0.01/mg: 0.1 Bandwidth: 5-3500MHz Automatic shutdown: about 10 minutes Working current: approximately 20mA Power supply: 1.5Vx 3AAA Measurement temperature range: -10~60 ﾰ C Working temperature and humidity: 0~60 ﾰ C/O~85% RH Storage temperature and humidity: -10~60 ﾰ C/0~80% RH Size: 170 x 73 x 33mm  Packaging list: Host * 1 Screwdriver * 1 Packaging box * 1 3 No. 7 batteries * 1 Instructions * 1 Velvet bag * 1