Automatic alarmAudible alarm, when the test result exceeds the safety value, the instrument will alarm automatically. Data LockOne-touch lock of radiation value. LCD displayLCD display of values for easier reading. Easy to use and carryFashionable design, easy handy operation, it is easy to carry and carry out measurements in the field. A instrument with two usesit can test electric field and magnetic field radiation at the same time. Overview : This meter can test electric field radiation and magnetic field emission to achieve the optimal test result. It is used to test and learn electromagnetic radiation situation indoors and outdoors. It is equipped with a built-in electromagnetic radiation sensor, which can display the radiation value on the LCD digital screen after control micro-chip processing. Specifications: Material: Plastic Weight: 165g/5.8oz Color: As pictures show Size size: 125 * 30 * 65mm/4.9 * 1.2 * 2.6in Unit: V/m (electric field); T (Magnetic Field) Accuracy: Electrical: 1V/m; Magnetic: 0.01T Range: Electrical: 1-1999V/m; Magnetic: 0.01-19.99 T Alarm threshold: Electrical: 40 V/m; Magnetic: 0.4 T Display: 3-1/2 LCD display Test bandwidth: 5 Hz to 3500 MHz Sample time: approx. 0.4 seconds Test mode: Bi-module synchronous test Over-range indication: LCD displays 1 Operating temperature: 0C-50COperating humidity: relative humidity List of packages: 1 * Electromagnetic Radiation Detector 1 * User Manual