Equipment Kit: You will receive 1 electromagnetic field meter and 2 motion activated balls; such a great combination can easily meet your needs, adding more suspense and fun 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/T) and electric field (in volts/meter); Note: This EMF meter cannot test RF values 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. Sound and light alarm: When the electromotive force reader test result exceeds the set value (0.4T 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 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 Power Supply:AAA 1.5V x 3pcs(Not included batteries) Colour:Black Material:Plastic Package Contents: 1 x Emf meter 2 x Light up ball Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.