A method for fabricating a micro-electro-mechanical system provides a semiconductor chip having a cavity with a radiation sensor MEMS. The menu provides a plurality of destination options including a first destination option for a residence of a family, a second destination option for a first member of the family at a first location other than the residence, and a third destination option for a second member of the family at a second location other than the residence. The bioelectric battery may also have a membrane surrounding the cathode to reduce tissue encapsulation.