When it was launched in mid 2012, the 5D Mk III was probably the best all-rounder DSLR in the world. So obviously we'd expect the 5D Mk IV to be the best all-rounder DSLR in the world as of late 2016.
And it is. It looks pretty much identical to the Mark III on the outside, but on the inside there are an awful lot of improvements. More pixels (30 million). More frames per second. Dual Pixel autofocus. 4K video. Built-in WiFi and GPS. Better weather sealing. Touchscreen control. And so on. Overall it slots nicely into Canon's range between the 1D X Mark II high-speed sports/action camera and the 5Ds / 5Ds R high-resolution cameras.
We can't realistically list all the detailed specifications of the camera here, so if you're interested you'll find them on the Canon UK website - here.
What's in the box? Quite a lot. Camera. Strap. Two genuine Canon LP-E6N batteries. Battery charger with mains lead. 32GB Sandisk Extreme CF card. USB interface cable. User manuals on CD. Have we forgotten anything? We don't think so!