A noise-free low-power consumption wide voltage range DC and AC contactor and remote telephone control system is disclosed. The buyer’s computer has a fingerprint file stored in the memory thereof. One filter component may be a resonant LC filter at or near an electrodewire interface that resolves the issue of insufficient attenuation by effectively blocking the RF induced current on the wire from exiting the wire through the electrode. The method may also include restoring the data stored in the capacitive backup circuit to the SRAM cell by electrically coupling the capacitive backup circuit to the input node. The shelter may include various features, including shelving, bathing facilities, sinks, beds, lighting, and the like.