Specification:Colour: BlackMaterial: ABSSize:135*60*27mmElectric field unit: V/mElectric field accuracy: 1V/mElectric field range: 1V/m-1999V/mElectric field alarm threshold: 40V/mMagnetic field unit: 1TMagnetic field accuracy: 0.01TMagnetic field range: 0.01T-19.99TMagnetic field alarm threshold: 0.4TRead the display: 3-1/2-digit LCDTest bandwidth: 5Hz - 3500MHzSampling time: about 0.4 secondsTest mode: dual mode synchronization result testWorking temperature: 0C-50CPower: 3 AAA batteries (not included) Features:Suitable mostly for measuring effects of radiation products, presentations, and personal understanding of radiation;Excellent design for a measurement of electromagnetic field radiation levels around power lines,Used widely in electrical equipment, electromagnetic radiation measurement: phones, computers, televisions, copiers, fax machines, air conditioners, refrigerators and other radiation sources tested;