Feature: 1. Large Screen: The display screen of electromagnetic radiation detector is large, which makes data reading more convenient, and the backlight can be turned on or turn off. 2. Easy to Use: The environmental radiation detector adopts key operation, just like a remote control. This tester has 4 modes, that is mute and alarm mode, test and pause mode. 3. High Quality Shell: The shell of the radiation tester is made of high quality ABS material, with good heat resistance, excellent cold resistance, high strength and good toughness. 4. Multifunctional: The electromagnetic radiation detector can meet the needs of family life detection, substation detection, mobile signal tower detection and so on. 5. High Performance: The magnetic field tester has the advantages of high sensitivity, wide range, durability and portability. Daily use helps to avoid radiation hazards. Specification: Item Type: Electromagnetic radiation detector Material: ABS Weight: Approx. 125g/4.4oz Test Scope: Power Density: 0-99.999μw/c㎡ Electric Field Strength: 0-999.99v/m Magnetic Field Strength: 0-99.999μT Test Accuracy: Power Density: 0.001μw/c㎡ Electric Field Strength: 0.01v/m Magnetic Field Strength: 0.001μT Frequency Range: Power Density: 50mHz-5GHz Electric Field Strength: 20Hz-100MHz Magnetic Field Strength: 20Hz-1MHz Battery: 3xAA batteries(Excluded) Purpose: Radiation detection of mobile phones, computers, televisions, refrigerators, high voltage lines, etc.. Package List: 1 x Electromagnetic Radiation Detector1 x Instructions