This meter can test 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 EMF Tester for testing the magnetic field radiation and temperature at the same time. Measure radiation of high voltage power lines, appliances, electrical wires. Sound-light alarm, when the test result exceeds the safe value, the instrument will alarm automatically. Data hold and max measurement, one-key lock the radiation value. Large & clear LCD display of the values for easy reading. Easy to operate with easy one-hand operation, easy to carry and make field measurement. Can measure the environment temperature with 2 temperature units (℃ and ℉). Specifications: Color: Blue + Black Material: ABS Plastic Unit: mG / μT (Magnetic Field) Accuracy: ±5% (50μT to 200μT)μT at 50Hz or 60Hz Range: Electric: 0～2000mG; Magnetic: 0～200μT Resolution: 1mG, 0.1μT Alarm Threshold: 40mG, 0.4μT Temperature: 0～50℃ / 32～122℉ Display: 4 digits LCD Display Test Bandwidth: 30Hz-300Hz Number of Axis: Single Axis Inductive Head Sampling Rate: 0.5 Seconds Test Mode: Bimodule Synchronous Test Over Range Indication: LCD Displays "HI" Operating Temperature: 0～50℃, Relative Humidity 0～80% Storage Temperature: -10～50℃, Relative Humidity: 0～70% Power Supply: 3 * 1.5V AAA Battery (NOT Included) Item Size: Approx. 130 * 50 * 27mm / 5.12 * 1.97 * 1.06in (L * W * H) Item Weight: Approx. 74g / 2.62oz Package Size: Approx. 22 * 15 * 3.5cm / 8.66 * 5.91 * 1.38in (L * W * H) Package Weight: Approx. 108g / 3.82oz Package List: 1 * Electromagnetic Radiation Detector 1 * User Manual (English)