Apple is giving a new twist to its flagship smartphone line: The company unveiled the iPhone Duo, its first foldable smartphone.

The company’s iPhone Duo foldable has an internal dual-display panel that provides the largest, most immersive screen size ever at 7.6 inches diagonally — and it’s also the thinnest iPhone ever, according to Apple. (When unfolded, it looks like a small iPad tablet.) There’s also a screen on the outside of the device.

The iPhone Duo is priced starting at $1,999 with 256 gigabytes of storage, ranging up to $3,199 for a model with 2 terabytes. Preorders start Oct. 16 and the device will begin shipping Oct. 23. It’s available in two colors, dubbed “star white” and “night sky.”

According to Apple, a few third-party apps — including Netflix, Zoom and Slack — are already taking advantage of folding display and the larger screen. Apple is releasing software development kits for developers to design (or redesign) their apps for the iPhone Duo.