Apple Inc. this week previewed the Apple Watch Series 10.

The Apple Watch Series 10 is the thinnest Apple Watch to date and includes the new S10 SiP with 4-core Neural Engine. In addition, it weighs up to 10 percent less than the Series 9.

The Series 10 sports the largest display on an Apple Watch with nine percent more screen area than the Series 7 to Series 9. Also, it’s the first product to offer a wide-angle OLED display that is up to 40 percent brighter than the Series 9 when view from an angle.

New faster charging allows for eight hours of use from a 15-minute charge and an 80-percent battery charge in 30 minutes.

Finally, Series 10 includes a new software feature to identify sleep apnea from Breathing Disturbances metrics.

Apple Watch Series 10 starts at $399. It will be sold Sept. 20.