This meter can test electric field radiation and magnetic field emission to reach the optimal test result. It is used to test and learn electromagnetic radiation situation indoor and outdoor. It is equipped with a built-in electromagnetic radiation sensor, which can display the radiation value on the LCD digital display after processing by control micro-chip. 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. LCD display of the values for easier reading. 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: ColorOrange + Black Material: Plastic Unit: V/m (Electric Field); T(Magnetic Field) Accuracy: Electric: 1V/m; Magnetic: 0.01T Range: Electric: 1-1999V/m; Magnetic: 0.01-19.99T Alarm Threshold: Electric: 40V/m; Magnetic: 0.4T Display: 3-1/2 LCD Display Test Bandwidth: 5Hz-3500MHz Sampling Time: Approx. 0.4 Seconds Test Mode: Bimodule Synchronous Test Over Range Indication: LCD Displays "1" Operating Temperature: 0°C-50°C Operating Humidity: Relative Humidity <80% Power Supply: 1 * 6F22 9V Battery (NOT included) Item Size: 12.5 * 6 * 3cm / 4.92 * 2.36 * 1.18in (L * W * H) Item Weight: 109g / 3.84oz Package Size: 23.1 * 16.7 * 6.4cm / 9 * 6.6 * 2.5 package Weight: 215g / 7.6oz Package List: 1 * Electromagnetic Radiation Detector 1 * User Manual (English)