Features: Versatility at its Best: Experience the convenience of a three-in-one device. This unit not only tests electromagnetic radiation but simultaneously detects electric fields (measured in V/m), magnetic fields (expressed in µT/mG), and even temperature (°C/°F). Its multi-functionality ensures all essential information is available at your fingertips. Precision You Can Trust: The GN902 model is engineered for superior precision, detecting magnetic fields as low as 0.01μT and electric fields down to 1V/m. Stay informed of even the slightest changes in environmental radiation. Safety Alerts: Built-in alarms notify you when thresholds are exceeded: 40V/m for electric fields and 0.4μT for magnetic fields. This feature provides timely warnings, allowing necessary precautions. Convenient Display and Usage: A backlit LCD screen offers clear readings even in dim conditions, while data retention and low battery prompts ensure you remain prepared and informed. Wide Application: Suitable for home, office, outdoor, or industrial use. An essential tool in a tech-driven world with gadgets like phones, computers, and TVs emitting radiation. Additionally, it's crucial for assessing the effectiveness of radiation protection apparel and equipment. Specifications: Model: GN902 Magnetic Field Unit: μT (Precision: 0.01μT; Range: 0.01μT-99.99μT) Electric Field Unit: V/m (Precision: 1V/m; Range: 1V/m-1999V/m) Alarm Threshold: Electric Field - 40V/m; Magnetic Field - 0.4μT Power Supply: 1.5V AAA battery x2 Net Weight: 53g Working Voltage: 3V Test Bandwidth: 5Hz-3500MHz Operating Conditions: Temperature: 0℃~50°C; Humidity: ≤80% RH Package Included: 1 x ANENG Electromagnetic Radiation Tester (NO BATTERY) 1 x Wrench 1 x User Manual