Certification : CEis_customized : YesFeatures: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. Keeping data Low electricity prompt Auto power-off Fashionable design,easy on-hand operation, it's easy to carry and make field measurement. Specifications:Material: Plastic Unit: V/m (Electric Field); T(Magnetic Field) Accuracy: 1V/m(Electric);0.01T(Magnetic) Range: Electric: 1-1999V/m; Magnetic: 0.01-19.99T Alarm Threshold: Electric: 40V/m; Magnetic: 0.4T Display: 3-1/2 LCD Display Test Bandwidth: 5Hz-3500MHz Sampling Time: Approx. 0.4 SecondsTest Mode: Bimodule Synchronous Test Over Range Indication: LCD Displays "1" Operating Temperature: 0C-50C Operating Humidity: Relative Humidity