Equipment Kit: You will receive 1 electromagnetic field meter and 2 motion activated balls; this combination helps meet your needs, adding functionality and interactive features Accurate measurement: Built-in electromagnetic radiation detector, processed by the control system, displays radiation values on a clear LCD digital screen; measures magnetic field radiation (in MG/T) and electric field (in volts/meter); Note: This EMF meter cannot test RF values Multifunctional: The EMF detector includes multiple functions such as data hold, maximum value tracking, simple touch lock for data, manual or automatic power off, safety threshold setting, and sound and light alarm Sound and light alarm: When the EMF reading exceeds the set value (0.4T or 40V), the indicator light flashes, the screen turns red, and the buzzer sounds; the buzzer can be turned off when operating in quiet environments to avoid disturbance Wide range of applications: This EMF detection device is compact and portable, operable with one hand; suitable for radiation testing of computers, induction cookers, microwave ovens, rice cookers, refrigerators, mobile phone towers, printers, and other common household or office electronic devices; helps identify potential radiation exposure, ideal for environmental surveys and research applications Power Supply: AAA 1.5V x 3pcs (batteries not included) Color: Black Material: Plastic Package Contents: 1 x EMF meter 2 x Light-up ball Only the above package content is included; other items are not part of this package Note: Lighting effects and display differences may cause slight variations between the product color in images and the actual item; measurement error allowance is +/- 1-3cm