Uniden Power Max 5.8 GHz
One base-station/answering machine that plugs into your landline's wall port and two remote wireless stations that communicate wirelessly.
Added, two headsets (may or may not work) and a new, unused battery. One of the handsets has a near-end-of-life battery you'll want to replace. The answering machine worked when I used it a few years back.
This could be a great upgrade for people tired of the not-good-enough-to-be-called mediocre audio fidelity of cell phones. Fidelity is waaaaaay better than any mobile, but not as good as historical Western Electric equipment.
Manual here: https://www.uniden.info/download/ompdf/TRU8885om.pdf