1: Multi-function detector: supports magnetic field measurement, electric field measurement, temperature measurement. 2: High-definition -screen digital display, clearly visible. 3: Double light alarm prompt. 4: Small and portable Application scenarios: mobile phone computer detection, maternity supplies detection, high voltage line detection, server detection, household equipment detection, outdoor environment detection. Basic parameters Maximum reading value: 0.01~199uT (0.1~1999mG) Detection frequency width: 30Hz~300Hz Resolution: 0.01uT/0.1mG Color: Black Material: ABS Package Contents: 1X Electromagnetic radiation detector (without 2XAA batteries) 1X English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.