What you measure with the body voltmeter is mainly the unnatural alternating voltage that your body receives from the electrical cabling and devices around you.When you are grounded this voltage drops which means that everything is connected properly and that the healing earth electrons reach you and can do their work for you, as they have for thousands of years for everything that touches the ground or stands in it.As you move around in the room the measured values ​​may vary. For example, you can stand on a floor where ceiling pipes run from the lighting of the room below you. When you measure, move your other hand closer to an outlet… the values ​​will still rise. If you now touch a well-grounded product, the meter goes down, this does not have to be zero.The most important thing is that the earth energy (electrons) reaches you and your body can now relax, anti-oxidize, build your resistance, inhibit infections, etc. ...Always make sure that the gray display of the voltmeter shows V at the bottom right and not mV (microVolt) so that you compare the correct values. You can adjust this with the 'Range' button.A correctly performed measurement is very convincing in terms of how grounding works and to see if everything is connected correctly and works for you.You can find it at: https://aarding.org/products/body-voltage-meterA clear and simple manual is included.