This Hukai ??? inaugurates the section “video game”, it is a series of Chinese products that all have the same software and the same quality, are able to measuring low-frequency magnetic fields with much approximation, are absolutely not able to measuring radio electric fields (RF).
Do not be fooled by the colors of the display, or the features written on the web page, the low price should make you understand many things.
MY PERSONAL OPINION: Obviously I would never buy a similar product, if not to play with my son.