How to Use: 1. Turn on off: short press the on off button to turn on the detector, the full screen display will display the current measured values of electric and magnetic fields for about 1 second, and long press the on off button to turn off the detector after startup. After no button operation for 5 minutes, the detector will automatically shut down Specification: Item Type: Electromagnetic Field Detector Model: XRCLIF-3121 Material: ABS Battery: 3.7V lithium battery 600mAh (Battery Included) Application: Digital equipment testing, power strip equipment testing, maternal and child products testing, high voltage equipment testing, server testing, household equipment testing Electric Field: Unit: V/m Accuracy: 1V/m Range: 1V/m-1999V/m Alarm Threshold: 40V/m Magnetic Field: Unit: μT Accuracy: 0.01μT Range: 0.01μT-99.99μT Alarm Threshold: 0.4μT Reading Display: 3-1/2 digital LCD Measurement Bandwidth: 5Hz-3500MHz Sampling Time: About 0.4 seconds Measurement Mode: Dual mode at the same time Overload Indication: The maximum value of the measurement range on the LCD Working Temperature: 0℃ 50℃ Working Humidity: Relative humidity is lower than 80% Package List: 1 x Electromagnetic Field Detector (Battery Included) 1 x USB Data Cable 1 x Manual