Drug delivery systems and biocompatible coatings for use with implantable stimulation devices such as cochlear implants have been developed. The payment system module and the device module are separated from the POS module in order to segment a portion of the payment processing system configured to handle payment card data from a portion of the system that does not handle payment card data. The method further includes executing one or more algorithms using the control signals received by the smart antenna apparatus as input to synchronize the smart antenna apparatus with the base station transceiver. A layer of lubrication material having a low coefficient of friction is adhered to at least on portion of the surface of the body interior. The item may be presented in contracted format andor expanded format.