Apple states the following:

"Guaranteed Apple quality.
Before we put a pre-owned Mac, iPod, or Apple TV up for sale in the Apple Outlet, it undergoes a rigorous refurbishment process to make sure it's up to Apple's tough quality standards. We back it with our standard one-year limited warranty. And you have the option of purchasing an AppleCare Protection Plan for it."

You can also find information about Apple's One-year limited warranty , Refurbishment process, and AppleCare Protection Plans.



The various sections of the outlet are as follows:

Refurbished iPod
Find deals on the Apple-certified iPod, iPod nano, or iPod shuffle you've always wanted.

Refurbished Mac
Shop Apple-certified Mac desktops and notebooks at once-in-a-lifetime prices.

Clearance Items
Get discount prices on new, unopened products from Apple and other manufacturers.

Big Deals
See special offers, promotions, and other great deals available for a limited time only.

A great place to save on Apple products
Apple tests and certifies every Apple refurbished product and each comes with a 1-year warranty directly from Apple. So if you are thinking about making the switch and want to save some money on a Mac be sure to check out the Outlet and Save Big on a Apple Certified Refurbished Mac. You can visit new Apple Outlet here.
 
For brand new items, you can visit the online Apple Store.