The new Apple Watch 10 is the thinnest smartwatch Apple has made yet – and it has the Apple Watch’s largest-ever screen display – 30% larger than previous Apple Watches.

New look: The watch comes in a new polished titanium finish in jet black, along with rose gold and silver.

Tracks sleep apnea: Apple’s latest watch can detect sleep apnea, the company said Monday. The common and potentially dangerous condition can cause breathing to stop while people are sleeping. The detection feature is awaiting clearance from the US Food and Drug Administration, Apple said, and is expected to be available in over 150 countries and regions later this month.

Faster charging: Apple says the new Apple Watch also charges quickly — up to 80% in 30 minutes, and it has a battery life of up to 18 hours.

New features: The latest device, which can now go 20 feet underwater, features a water temperature sensor and a depth gauge. It also has specs specifically designed for snorkeling, such as direction and time spent underwater.

Price and availability: Apple’s new Series 10 watch will start at $399, according to the company. It is now available to pre-order and will be available on September 20.