This EMF Meter can test electric field strength and magnetic field strength to reach the optimal test result. It& 39;s widely used to test and learn electromagnetic radiation situation indoor and outdoor. Suitable to measure the electro-magnetic generated machine, measure low frequency appliance and high frequency radiation appliance.Features:One instrument with two uses, it can test the electric field and the magnetic field radiation at the same time.Sound-light alarm, when the test result exceeds the safe value, the instrument will alarm automatically.Data locking, one-key lock of the radiation value and easily read the value.Measure the Environment Temperature - with 2 temperature units ( and ).Radiation assessment, remind you whether the radiation value is safe or not.Fashionable design, easy on-hand operation, it& 39;s easy to carry and make field measurement.Specifications:Material: ABS PlasticUnit: V/m (Electric Field); T(Magnetic Field)Accuracy: Electric: 1V/m; Magnetic: 0.01TRange: Electric: 1-1999V/m; Magnetic: 0.01-99.99TAlarm Threshold: Electric: 40V/m; Magnetic: 0.4TDisplay: 3-1/2 LCD displayTest Bandwidth: 5Hz-3500MHzSampling Time: Approx. 0.4 SecondsTest Mode: Bimodule Synchronous TestOverload Indication: Max value of measurement range on LCDOperating Temperature: 0C-50COperating Humidity: Relative Humidity Working Voltage: 3.7VPower Supply: 3.7V 600mAh lithium batteryItem Size: Approx. 133 * 60 * 25mm / 5.24 * 2.36 * 0.99inItem Weight: Approx. 121g / 4.27ozPackage Size: Approx. 17.5 * 12 * 5.3cm / 6.89 * 4.73 * 2.09inPackage Weight: Approx. 243g / 8.57ozPacking List:1 * Electromagnetic Radiation Detector1 * USB Cable1 * User Manual (English)