Check the listing for details. DBTector DB-200EM EMF Meter Electric And Magnetic Field Meter. Condition: New. Listed at 59.00 USD. Product featuresEasy to use EMF meterMeasures Electrical and Magnetic FieldsSound alarm for high readingsBack light displayProduct descriptionElectromagnetic Field Meter* Unit: electric field: V/m (voltmeter); magnetic field: ?T (micro Tesla) and mG (milligauss)* Accuracy: electric field: 1V/m; magnetic field: 0.01?T/0.1mG* Range: Electric field: 1 ~ 1999V/m; Magnetic field: 0.01?T ~ 19.99?T / 0.1 ~ 999.9 mG* Alarm threshold: electric field: 40V/m; magnetic field: 0.4?T / 4mG* Readings: 3 ~ 1/2digit LCD* Measurement bandwidth: 5Hz ~ 3500MHz* Sampling time: About 0.4 seconds* Measurement mode: Dual-mode test* Overload indication: Maximum value of measurement range on LCD* Operation temperature: 0°C ~ 50°C* Operation humidity: Relative humidity below 80%* Working voltage: 3.7V* Rechargeable 3.7V lithium battery * Data lock* Backlight display* Automatic shut-down* Average and peak values* Low battery prompt* Size: 61 * 25 * 134mm* Weight: 131.3g