SAN FRANCISCO, Calif. (CNN) — If you’re planning to buy the new iPhone 5, you may have to shell out another $30 on top of the cost of the phone.

That’s because the new version of the Apple phone has a a smaller, eight-pin dock connector instead of the traditional 30-pin connector.

So anyone who wants to keep using their iPhone accessories with the old dock connector will need to buy an adapter.

“A lot’s changed and it’s time for the connector to evolve.  That’s just what we’ve done. Our new connector is called ‘lightning.’  So now we have ‘thunderbolt’ and ‘lightning’  in our connector strategy.  This connector is a modern connector for the next decade, all digital 8-signal design,” says Phil Schiller, Apple’s Senior Vice President of Marketing.

“It’s adaptive to what those signals need to be for the different accessories you might plug in to.  It’s more durable and much easier to use because now you can plug it in in either direction; it doesn’t matter. Best of all for the engineering team to make a product like this, it’s 80 percent smaller.  That’s a huge difference in the world’s thinnest smartphone,” Schiller adds.

Apple’s online store already has the adapters available for pre-order.

They cost $29 dollars each, or $39 if you want one with a cord attached.

The phone itself is expected to begin shipping on September 21st.