A simple EMF detector! The detector is as ACCURATE as the sensor of your device. Both Pro and Free have: -->Magnetic Field B in microTesla,Gauss and milliGauss -->Auxiliary Field H in ampere per meter -->Recorder feature. Data can now be saved live on text file for later use on a computer. This requires the permission to read and write on external storage. -->Keep screen ON button -->XYZ, max-min and graphs. -->The classic EMF meter with the needle and LEDs The Pro has: -->No ads -->Recorder f