TP Link wifi booster kit (Callowell GL5)

This is a collection of devices from two different set-ups in two different houses, from a time when wifi was unreliable throughout the house. May still be useful to someone. Not exactly sure which components you'd need to make a complete set-up but confident you have at least one of them here and could relay extra wifi strength to at least two, possibly three different places in the house.

Please say where you'd like to use it and indicate to me that you know enough to set it up properly. It wasn't that easy to set them up initially, and I want to make sure it has a good home where it will be useful.