Nikon's first full-frame mirrorless camera (OK, joint first with the lower-resolution but otherwise similar Z6) is a pretty capable machine. It's essentially a mirrorless version of the D850; aside from the expected differences between a DSLR and a mirrorless camera, the two cameras are remarkably alike. The Z7 also features in-body image stabilization (a first for Nikon), and the FTZ adapter allows you to use all your F-mount lenses, so you now have image stabilization on any lens you own. That seems like a pretty big deal to us.
We can't realistically list all the detailed specifications of the camera here, so if you're interested you'll find them on the Nikon UK website - here.
What's in the box? Quite a lot. Camera. Adapter. Strap. Two genuine Nikon EN-EL15b batteries. Battery charger with mains lead. 64GB Sony G-Series XQD card. USB cable. User manuals on CD. Have we forgotten anything? We don't think so!