Good question John. ;-) My wife has the 2nd generation, aka kindle 2, it's a little bigger and heavier. If what you just bought has a keyboard then it's a 3rd generation also called Kindle Keyboard with WiFi and 3G, it's often called a kbd or kkb. If you have a touch version then it's a Kindle Touch 3G, often referred to as a Touch. Hope thus helps.