This portable instrument is specially designed for electromagnetic field radiation measurement. With quick response and high accuracy、 ideal for professional or personal use. Press "Range" button to change measurement resolution. 2 optional units: milligauss and micro tesla. Practical data hold and peak hold function. Digital LCD display、 easy to read. Dimensions: 5.12 in x 2.36 in x 1.18 in (13.0 cm x 6.0 cm x 3.0 cm) Weight: 3.77 oz (107 g)