Arguably the most fascinating feature unveiled during Apple's iPhone event Tuesday is Touch ID, a fingerprint sensor included with the iPhone 5s.
With the device launching on Sept. 20, we answer 10 questions about the iPhone's latest feature.
1. What is it?
Touch ID is a fingerprint sensor that sits on the home button of the iPhone 5s.
2. What does it do?
It allows users to perform certain functions on the iPhone by simply placing their thumb or finger on the home button.