Product Name : Electromagnetic radiation tester Model : GM3120 Functional and technical parameters Unit: field : V / m, the magnetic field μT Accuracy : electric: 1V / m, magnetic 0.01μT Range : electric: 1-1999V / m, magnetic 0.01-19.99μT Alarm Threshold : electric: 40V / m, magnetic 0.4μT Test Bandwidth : 3-1 / 2 LCD display Sampling time : 5Hz-3500MHz Test mode : approx. 0.4 seconds Overload Tip : measured with dual-mode Data lock : LCD displays "1" Low Light Display : √ Automatic shutdown : √ Average and peak : √ Low power tips : √ Operating Temperature : 0oC-50oC Operating Humidity : 80% Operating voltage : 9V Dimensions : 63.6 * 31 * 125.8mm Weight : 146g Power : 6F229V battery