Technical Parameters Alarm Threshold: > 4.0 mG Electromagnetic Span: 0.01uT~99.99uT Electrical Span: 1V/m to 1999V/m Alarm Threshold: >40V/M Temperature Range: 0℃-50℃/32℉-122℉ Accurate Detection Compared to normal EMF meter, EMF meter. is wider and the measurement is better. It is accurate and works better with the spherical detection range of traditional probe. The electrical field resolution is 0.1 mG/0.01 μT, the electrical field strength resolution is 1 V/M, and the electrical field span is 1 to 1999 V/M. When the buzzer sounds during the buzzer alarm test and the measurement exceeds the set value (0.4μT (4mG) or 40V/m), the warning sign on the screen will flash and the buzzer will sound. Spherical probe detection, better results LCD screen with backlit LCD display makes digital display more clear. In addition, the EMF meter can display both electrical and magnetic field at the same time, and there is a warning light on both sides that are rare in similar products. Contents: EMF meter, 2 AAA batteries, 1 user manual, 1 storage bag.