[LCD Display] Electric EMF meter has large LCD display to show value and trend chart. The meter has equipped with a built-in electromagnetic radiation sensor, which can display the radiation value on the clear LCD digital display [Sound & Light Alarm] Electromagnetic radiation detector has sound and light alarm. when the value exceeds the safe value, the radiation detector will automatically produce alarm to remind you. [Wide Application] Portable EMF meter is widely used for ghost hunting and measuring electromagnetic fields to identify devices that generate high radiation, like mobile phone, TV, microwave oven, refrigerator, computer, etc. [Battery Powered] Magnetic field monitor is powered by 3x AA dry battery (not included) or 3x 1.2V rechargeable battery (not included). Dry batteries can not be charged, and rechargeable battery can be charged in 4-6 hours. [3 In 1] 3 In 1 EMF meter can detect electric field, magnetic field and radio frequency field, so you can use only one machine to meet your different detecting needs, more convenient than single function meter. Parts List: 1x EMF Meter 1x Instruction Manual Product Description: According to related reports, unexplained phenomena is linked to magnetic fields, such as alleged ghosts. Our 3 in 1 EMF meter can help you detect electric field, magnetic field and radio frequency field at the same time, which is super easy to use. It's great for home or industrial inspections of EMF levels. Key Features: Precise Measurement: EMF meter with high sensitivity can accurately measure wide spectrum EMF to prevent potentially harmful overexposure to EMF. Portable Size: Magnetic field detector measures about 105 x 70 x 30mm, small enough to put into your pocket or bag, easy to store and carry outside. Specification: Product Name: EMF Meter Color: black, blue, white (optional) Material: ABS Screen size: 57 x 43mm/2.2 x 1.7 in Test scope: Power density: 0-99.999 W/cm Electric field intensity: 0-999.99v/m Magnetic field intensity: 0-99.999T Test accuracy: Power density: 0.001 W/cm . Electric field intensity: 0.01v/m Magnetic field intensity: 0.001T Frequency range: Power density: 50MHz-5GHz Electric field intensity: 20Hz-100MHz Magnetic field intensity: 20Hz-1MHz Battery: 3x AA 1.5V battery or 3x 1.2V rechargeable battery (not included) Charging: USB 5V 2A input Charging time: 4 hours Commodity size: 105 x 70 x 30mm Note: 1.There may be slight differences between the picture and the actual color of the commodity. We will try our best to show you the exact color. 2.Please allow slight dimension difference due to manual measurement.