The BioCharger requires no physical contact and its operation is non-invasive. You simply place yourself in a relaxed position, sitting or standing, approximately 3-5 feet from the unit and let the transmitted energy waves pour through you. You do not have to attach any wires, pads, electrodes, or other devices. The electromagnetic waves, like radio waves, pass through everything within its broadcast range, which is approximately 10 to 15 feet.
Typically, having 1-4 users per session is recommended and comfortable, although there really is nothing preventing larger group sessions. However, the power of the field decreases sharply as a function of the distance from the device.