Like a lab rat accessorized by scientists with some sort of mind-machine alpha-stage, pre-release technology graft, this humble, generic, ubiquitous model of doorbell has been raised to the ranks of high security thanks to the unlikely pairing of a digital touch pad. The pad comes with a sentience- and surveillance-suggesting red light. There are two other spots to its left where additional lights may appear, or maybe they are slots for cameras. Perhaps if you know the entry code, you’re aware of their purpose. Or perhaps that bit of knowledge is reserved for yet a higher tier still of security clearance.