Feature: 1. Dual Testing Functions: the EMF meter can accurately detect and measure the electric field radiation and magnetic field emission at the same time. It also can measure the environment temperature(℃/℉). 2. Audible and Visual Dual Alarm: if the tested value exceed the preset alarm value, it will produce sound and light alarm signal immediately. 3. Wide Detecting Frequency \u0026 Measurement Range: 20Hz~300Hz magnetic field and 20Hz~3500MHz electric field of working frequency range; 0.01~199.9μT(0.1~1999mG) magnetic field and 0~1999V/m electric Field of measuring range. 4. User-friendly Design: soft operating buttons for the alarm value setting, MAX/AVG value switching, and units conversion, the mini pocket size EMF tester just powered by 3pcs AAA batteries, which makes it convenient for using and carrying. 5. High Precision \u0026 Sensitivity: reliable for measure electric and magnetic field radiation of mobile phone, hair dryer, computer, TV, printer, attendance machine, refrigerator, etc. Specification: Features: Dual Testing Functions: the EMF meter can accurately detect and measure the electric field radiation and magnetic field emission at the same time. It also can measure the environment temperature(℃/℉). Audible and Visual Dual Alarm: if the tested value exceed the preset alarm value, it will produce sound and light alarm signal immediately. Wide Detecting Frequency & Measurement Range: 20Hz~300Hz magnetic field and 20Hz~3500MHz electric field of working frequency range; 0.01~199.9μT(0.1~1999mG) magnetic field and 0~1999V/m electric Field of measuring range. User-friendly Design: soft operating buttons for the alarm value setting, MAX/AVG value switching, and units conversion, the mini pocket size EMF tester just powered by 3pcs AAA batteries, which makes it convenient for using and carrying. High Precision & Sensitivity: reliable for measure electric and magnetic field radiation of mobile phone, hair dryer, computer, TV, printer, attendance machine, refrigerator, etc. Specifications: Material: ABS Magnetic Field Strength Range: 0.01~199.9μT(0.1~1999mG) Electric Field Strength Range: 0~1999V/m Magnetic Field Strength Resolution: 0.01μT/0.01mG Electric Field Strength Resolution: 1V/m Magnetic Field Strength Frequency Range: 20Hz~300Hz Electric Field Strength Frequency Range: 20Hz~3500MHz Temperature Measurement Range: -10~50℃ Temperature Resolution: 0.1℃ Power Supply: 3 * 1.5V AAA battery (NOT included) Item Size: 130 * 50 * 27mm / 5.12 * 1.97 * 1.06in Item Weight: 85g / 2.99oz Package Weight: 127g / 4.48oz Package Size: 19.3 * 7.5 * 3.5cm / 7.60 * 2.95 * 1.38in Packing List: 1 * EMF Tester 1 * Manual (English) Package List: 1 * EMF Tester 1 * Manual (English)