Description: Dual-purpose: A machine with dual-purpose, can test the electric field and magnetic field radiation at the same time. Automatic alarm: Sound and light alarm, when the detection result exceeds the value, the instrument will automatically alarm. One-key lock: Data lock, radiation value one-key lock. The LCD displays the value for easy reading. Intimate reminder whether the current radiation value is . Wide range of applications: Mainly used to test household items, offices, industrial sites, etc. Easy to carry: stylish design, easy to operate, easy to carry and carry out on-site measurements. Specification: Material: Plastic Measuring Range: 1V/M-1999V/M Measurement Accuracy: 1V/M Size Chart: Size: 13.3x6.5x2.5cm/5.23x2.55x0.98 inches Package Includes: 1 Piece Electromagnetic Radiation Tester 1 Piece Manual(3 Pack) : Please Allow 1-3 cm/ 0.39-1.18 inch Difference Due to Manual Measurement. Colors Can Appear Different Depending on Light and How the Listing is Viewed. Thanks for Your Understanding and Attention. Wish You a Pleasant Shopping Experience!