EMF828 EMF Tester Low Frequency Filed Intensity Meter For Particular Objects Or Devices Radiate Electromagnetic Waves The meter can detect low frequency electromagnetic waves of particular objects or devices. It can be used for power wire, computer monitor, TV, o and visual, electromagnetic oven or analogous electrical installations.Reliable electromagnetic field measurement and quick response.Simple operation.Data Hold function-hold the current data.Peak Hold function-only display new value when larger data value appear.Power: 1 * 9V Battery (model 6F22, NOT included)Measuring Range:0.1-400mG, 1-4000mG0.01-40uT, 0.1-400uTAccuracy:(4%rdg + 3 Dgt)at 50Hz/60HzProper Frequency: 30Hz-400HzOverflow: LCD Display "OL"Sampling Rate: about 2 times/secOperating Environment:Relative Humidity: 80%RHDimension: 138x 87 x 35mm / 5.43x 3.42x1.38inWeight: 108g / 3.8ozColour:As shownMaterial:plasticPackage Contents:1 x EMF TesterOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.