FY876 electromagnetic radiation detector is a portable digital EMF tester for detecting electric field and magnetic field radiation. It supports wide frequency range from 5Hz to 3500MHz, with stable measuring accuracy and clear LCD backlight display. This device features real-time data reading, maximum value hold function and adjustable alarm threshold. Color indicator lights remind users of different radiation levels. Made of lightweight durable ABS housing, it is powered by 9V battery with auto power-off to save energy. Widely applied to test household appliances, power lines, electrical equipment and office devices. Factory direct supply supports bulk wholesale. It is an essential safety measuring tool for families, inspectors and maintenance technicians.