The present invention relates to methods and devices that help to curb appetite andor reduce food intake. The cap side coupling device includes a circular coupler and a latch coupler, the circular coupler is fixedly coupled to the visor unit and the latch coupler is fixedly coupled to the band unit, and the circular coupler visor unit is rotated or fixed on the latch coupler band unit. The switching network also selects one of the selected reference voltages or the intermediate voltage as the analog output voltage.