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's easy to carry and make field measurement.    Specifications:  Material: ABS Plastic  Unit: V/m (Electric Field); μT(Magnetic Field)  Accuracy: Electric: 1V/m; Magnetic: 0.01μT  Range: Electric: 1-1999V/m; Magnetic: 0.01-99.99μT  Alarm Threshold: Electric: 40V/m; Magnetic: 0.4μT  Display: 3-1/2 LCD display  Test Bandwidth: 5Hz-3500MHz  Sampling Time: Approx. 0.4 Seconds  Test Mode: Bimodule Synchronous Test  Overload Indication: Max value of measurement range on LCD  Operating Temperature: 0°C-50°C  Operating Humidity: Relative Humidity <80%  Working Voltage: 3.7V  Power Supply: 3.7V 600mAh lithium battery  Item Size: Approx. 133 * 60 * 25mm / 5.24 * 2.36 * 0.99in  Item Weight: Approx. 121g / 4.27oz  Package Size: Approx. 17.5 * 12 * 5.3cm / 6.89 * 4.73 * 2.09in  Package Weight: Approx. 243g / 8.57oz    Packing List:  1 * Electromagnetic Radiation Detector  1 * USB Cable  1 * User Manual (English)