Description : One instrument with two uses , it can test the electric field and the magnetic field radiation at the same time . Sound - light alarm , when the test result exceeds the safe value , the instrument will alarm automatically . Data locking , one - key lock of the radiation value . LCD display of the values for easier reading . Radiation assessment , remind you whether the radiation value is safe or not . Fashionable design , easy on - hand operation , it &# 39 ; s easy to carry and make field measurement . Specification : Color Black Material : Plastic Model : DT - 1130 Display : 3 - 1 / 2 LCD Display Test Bandwidth : 5Hz - 3500MHz Sampling Time : Approx . 0 . 4 Seconds Test Mode : Bimodule Synchronous Test Over Range Indication : LCD Displays & quot ; 1 & quot ; Operating Temperature : 0 C - 50 C Operating Humidity : Relative Humidity & lt ; 80 % Power Supply : 1pc 6F22 9V Battery Size ( L x W xH ): Approx . 17x 11x 5cm / 6 . 69x4 . 33x1 . 97inch Size Chart : Measurement procedure : 1 . Press the power switch to align the to - be - measured appliance for measurement 2 . Slowly approach the object to be measured with the handheld instrument until it comes into contact with it . the closer you get to the object under test , the greater the electromagnetic radiation . Note : high pressure objects can be measured remotely . 3 . Try to change the Angle of the instrument during the measurement process , and the best measurement effect has been achieved . 4 . If the power supply of the object is turned off during the measurement , the instrument reading should return to zero unless there is any other interference . Package Includes : 1 Piece Electromagnetic Radiation Detector Note : Please Remove the battery when the instrument is not in use