A device for preparing to mount a wall fixture includes a main base having opposed first and second ends and a first auxiliary base having a substantially similar configuration. A length of the data packet and the data packet are stored in the memory and the length and the data packet are flushed from the memory when the data packet is invalid. The control valve assembly including a body and a stator. The electrode array can be formed from a combination of bulk and surface micromachining, and can include electrode tips having an electroplated metal or a metal oxide for biocompatibility.