: The main control unit that sits behind the wall.

Con.Push Button Valve,Slide Rail Kit,Outlet Elbow Black ... - Eastbrook

If you are using the contents of the .rar to install the unit, ensure you follow these general plumbing steps often found in such guides:

: The vertical rail and adjustable handset holder.

: Use a utility like WinRAR or 7-Zip to unpack the .rar folder.