Feature: 1. High Accuracy Sensor: This radiation detector utilizes a high accuracy sensor and measurement technology to provide accurate measurement results. 2. Easy To Operate: This radiation detector is very easy to operate, the user only needs to follow the instructions in the manual to start the measurement. 3. Display Screen: This radiation detector has a display screen that shows the measurement results very intuitively, giving you a quick overview of the electromagnetic wave magnetic fields in your surroundings. 4. Wide Application: This radiation detector has a wide range of applications and can be used in homes, offices, schools, hospitals or other public places. 5. Excellent ABS Material: This radiation detector is made of excellent ABS material, which is sturdy and wear resistant, not easy to be damaged, and has a long service life. Specification: Item Type: Digital Electromagnetic Field Radiation Detector Material: ABS Electromagnetic Frequency Response Range: 5-300Hz Electromagnetic Strength Range: 0.1-199.9mG Resolution: 0.1mG Alarm Threshold: >4.0mG Accuracy: ±15% Electromagnetic Strength Range: 0.01-19. 99uT Resolution: 0.01uT Alarm Threshold: 0.4uT Accuracy: ±15% Electric Field Strength Frequency Response Range: 4Hz-3.5GHz Electric Field Strength Range: 1-1999V/M Resolution: 1V/M Alarm Threshold: >40V/M Accuracy: ± 15% Temperature Range: -20-60℃ Accuracy: ±2℃ Power supply: 3 x 1.5V AAA Battery ( Shipped Without Battery ). Package List: 1 x Digital Electromagnetic Field Radiation Detector1 x Manual