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; 0.01~199.9T(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; 0.01~199.9T(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: ABSMagnetic Field Strength Range: 0.01~199.9T(0.1~1999mG)Electric Field Strength Range: 0~1999V/mMagnetic Field Strength Resolution: 0.01T/0.01mGElectric Field Strength Resolution: 1V/mMagnetic Field Strength Frequency Range: 20Hz~300HzElectric Field Strength Frequency Range: 20Hz~3500MHzTemperature Measurement Range: -10~50Temperature Resolution: 0.1Power Supply: 3 * 1.5V AAA battery (NOT included)Item Size: 130 * 50 * 27mm / 5.12 * 1.97 * 1.06inItem Weight: 85g / 2.99ozPackage Weight: 127g / 4.48ozPackage Size: 19.3 * 7.5 * 3.5cm / 7.60 * 2.95 * 1.38inPacking List:1 * EMF Tester1 * Manual (English)Package List:1 * EMF Tester1 * Manual (English)