This is a comparison of radio frequencies at our local high school library (from Wi-Fi) and the radio frequencies at home on a wired laptop. Notice the extremely high levels that occur at the one minute mark of the first video. My certification is in the field of Building Biology which recommends an RF level of less than .01 on this meter. Learn more about Wi-Fi in schools in the article Health Risks of Wi-Fi in schools. http://it-takes-time.com/2015/10/heal...
Purchase the Cornet meter at Just So Natural Products. http://justso.co/product/cornet-elect...