Features Multifunctional Detector: A machine with two functions can test electric and magnetic field radiation at the same time. When the test result exceeds the safe value, the instrument will alarm automatically. Range of Application Electromagnetic radiation detectors are mainly used in electrical appliances in life, which can help people stay away from radiation sources and protect them from the dangers of radiation. One key data lock: data hold and transparent liquid crystal display, one key to lock the radiation value, easy to read the value, radiation assessment can remind you whether the radiation value is safe. Clear Data Display: Equipped with a built-in electromagnetic radiation sensor, it can display the radiation value. After being processed by the control microchip, it can clearly display the radiation value on the LCD screen. Easy to use and operate. CUSTOMER SERVICE - We stand behind all of our items with a 100% product warranty and promise to provide you with the best customer support. If you have any problem with our Electromagnetic Radiation Tester, please contact us by email, we will try our best within 24 hours to reply. Specifications: Model No.: ET825 Material: ABS Electric field: Accuracy: 1V/m-1999V/m. Frequency range: 5Hz -3500MHz Alarm threshold: >40V/m Resolution: 1V/m Magnetic field: Accuracy: 0.01μT-99.99μT Alarm threshold: >0.4μT Resolution: 0.01μT Response Time: 0.4S Battery model: 3 x 1.5V AAA batteries (not included) Packing size: 15*7.5*3.5cm/5.9*3.0*1.4inch Package weight: 145g/5.1oz Packing list: 1 x Electromagnetic radiation tester. 1 x user manual Package List 1 x Electromagnetic Field Radiation Detector 1 x Manual