The Body Voltage Kit is the best way to measure your exposure to electric fields. If you are not working with a local EMF consultant you will need to know how many circuits to turn off before purchasing an EMF SleepSwitch. The only way to know the level of electric fields you are being exposed to either at home, work or where ever you are - is to measure. Add an extra grounding cord to test the affect of grounding computers, metal work tables and bed frames etc. Be informed, stay informed. Add consulting if you need help in your assessment, we can video link with you and walk you through the process. Contact firstname.lastname@example.org for consulting details.