SMART SENSOR ST1393 EMF Meter Electromagnetic Field EMF Detector Handheld Mini Digital LCD Radiation Tester ?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(??/��H) ?Audible and Visual Dual Alarm: if the tested value exceeds the preset alarm value, it will produce sound and light alarm signal immediately ?Wide Detecting Frequency and Measurement Range: 20Hz~300Hz magnetic field and 20Hz~3500MHz electric field of the working frequency range; 0.01~199.9|��T(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 is just powered by 3pcs AAA batteries, which makes it convenient for using and carrying ?High Precision and Sensitivity: reliable for measuring electric and magnetic field radiation of mobile phones, hairdryers, computers, TV, printer, attendance machine, refrigerator, etc. Specifications: ?Material: ABS ?Magnetic Field Strength Range: 0.01~199.9|��T(0.1~1999mG) ?Electric Field Strength Range: 0~1999V/m ?Magnetic Field Strength Resolution: 0.01|��T/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 included: ?1 x EMF Tester ?1 x English User Manual