A strap band including a flexible wire bus having electrodes and wires coupled with the electrodes is described. The wire bus may be encapsulated in the strap band by a molding process. The wire bus may determine electrode positions relative to each other and other structure coupled with the strap band. The strap band may be coupled with a device that includes circuitry that drives signals on to some of the electrodes and receives signals from non-driven electrodes. The electrode spacing and strap band dimensions may be selected to form a strap band that may accommodate a wide range of user body sizes for a target region the electrodes are positioned in contact with.
