... field strength. It has a maximum range up to 0 - ± 30mT, 0 - ± 300mT, 0 - ± 3000mT, and a minimum basic accuracy ... Supply6V batteryMeasuring Range0-±30.0mT,0-±300mT,0-±3000mTthree gears,gear shifting automaticallyAccuracyMore than 1.0% (full scale)Resolution0.1 mT(1Gs) ... Working ConditionTemp.: 0~50ºC, humidity:35~80 ...