Asked in the quiet

Is this where I order?

Almost. This is the brand shelf; the buy button on each model opens its live listing, and the order happens there.

Which filter fits the PU-P05?

The genuine PU-P05 cartridge, sold single and in packs of two, three and four. Same cartridge in every box, only the count changes.

How often does the filter change?

A few months in a lived-in room. Pets, candles and open windows shorten that; a glance at the filter face tells you more than any calendar.

Are the prices on this site live?

They are read from the live listings and can drift by the hour. The figure on the listing is the one you pay.

One sensor tower or a multi-room set?

Separate rooms with doors want a unit each, which is what the sets of two, three and four are for. One open space is where the Auto Sense tower and its 1095 sq ft rating earn their keep.

Do the speakers pair up?

The TWS model links to a second unit of the same model for stereo. The RGB model plays solo, with AUX and card slots for wired sources.