Sound and light alarm: When the electromotive force reader test result exceeds the set value (0.4μT or 40V), the indicator light flashes, the screen turns red, and the buzzer alarms; if you are testing in some quiet areas, you can turn off the buzzer first device so as not to disturb other areas Equipment Kit: You receive 1 electromagnetic field meter and 2 motion activated cat balls; such a great combination can easily meet your needs, adding more suspense and fun Multifunctional: The electromotive force detector has multiple functions, including data retention, maximum measurement, simple touch lock data, manual or automatic shutdown, safety value setting, sound and light alarm, etc. Accurate measurement: Built-in electromagnetic radiation detector, processed by the control , can display the radiation value on the clear LCD digital display; Measure magnetic field radiation (in MG/μT) and electric field (in volts/meter); Note: This EMF meter cannot test values Wide range of applications: This ghost detector device is small and portable, and can be operated with one hand. It is suitable for radiation testing of , , computers, induction cookers, microwave ovens, rice cookers, refrigerators, mobile phone towers, printers, etc., helping to reduce possible damage. Radiation risks to your family's health, perfect for , parapsychology research and hotel inspections, Weight: 0.3196702799 pounds, Manufacturer: Prterver