The main feature of this case is of course the flip screen cover, that allows easy access to all phone features without removing it from the case. You can even dock the iphone with this case on, as you can see in the bottom picture.
It comes packed with a completely removable belt clip and can be used together with Case-mate's leather holster, but this one is sold separately.
recently bought a case like this but it included a spare high capacity battery. It is called the iPowerJacket and can be purchased/researched at www.iphonebattery3g.com. So far very satisfied it more than doubles the life of my original oem battery