Check the screen. if you can see pixels, its an iPad 2. Also, when you pull up a keyboard on the iPad, if there is a little button on the bottom row that looks like a microphone, then it is the New iPad
There is a microphone icon located at the bottom of the keyboard screen. This is ONLY true IF you have turned on dictation from the general settings section under keyboard. If it is turned on, you will see a microphone key on the bottom left of the keyboard next to the space bar.