one NEW TES1390 EMF Tester Gauss Electromagnetic Field Meter
Range 200 / 2000 milli Gauss. Resolution 0.1 / 1 milli Gauss. 200 micro Tesla. 0.01 / 0.1 micro Tesla. Storage Temp and Humidity -10 ℃ to 60 ℃ below 70%RH. Number of Axis Single axis. 0.4 second.