The present invention provides arylalkylamine compounds as calcium sensing receptor modulators. An analog voltage signal-of-interest is selectively passed through the multiplexor to the buffer. Each field contains or identifies an object with associated attributes or data. The rigid housing is mountable within a cartridge which, in turn, is mountable within a dispenser housing including an eyelid depressor and a trigger for simultaneously actuating the eyelid depressor and pump. The module can include test access, power over Ethernet, or circuit protection features.