I have never seen one of those contraptions. Ask the mfgr for an instruction pamphlet.

i guess I found the answer with google. I have to order this attachment, and I have three hose bibs so not too happy about ordering three of these. Our previous house was 20 years old, and we never had a problem with frozen pipes or leaking hoses. I’m not convinced I needed these.

https://m.youtube.com/watch?v=_Zl1pO6LBvQ

https://smile.amazon.com/gp/product/B01N07XLE6/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

A new one on me, too. How does it operate? Is there a brand name on it that you can google?

The pics are small but interpretation of the text molded into the devices and Google advises the brand is Aquor.

Attach the adaptor to a garden hose (threaded end).

Open the cover on the wall tap.

Push the other end of the adapter into the tap and twist clockwise to turn on the water flow.

Push the adapter slightly and turn counterclockwise to turn off the flow and remove it from the tap.

Yes, it’s Aquor. The YouTube video explains it. During my walk-through, I got a long piece ( second picture above) and the builder told me to just stick it in the hose bib and turn it, but he didn’t actually do it or he would have been drenched, too. I’m just glad there is something small to attach ( from Amazon) so that I don’t have to have a 100’ hose attached in order to fill a gallon watering can.