Apple just took the wraps off the Apple Watch Series 10 at its Monday event, and the upgrades are eye-catching. The new model sports a 40 percent brighter OLED screen that’s even bigger than the one found on the rugged Apple Watch Ultra. If you’re wondering how it feels on the wrist, it’s thinner and lighter too—10 percent on both counts—coming in at a sleek 9.7 millimeters.

That larger display isn’t just for looks. Apple’s bigger OLED screen now fits an extra line of text, making it easier than ever to catch up on emails or texts without needing to scroll endlessly. Plus, the Series 10 is offered in two slightly bigger sizes—42mm and 46mm—though the good news is your old straps will still fit, no need to worry about replacing those bands. Apple designed the new straps to work with older models too, in case you want to mix and match.

Under the hood, the Series 10 runs on the new S10 SiP (System in Package), boasting a four-core neural engine for even snappier performance. The smartwatch’s aluminum body shines with a polished finish, and a metal back helps house the antennas seamlessly. It’s still water-resistant up to 50 meters, so whether you’re swimming or showering, no sweat. Battery life? You’ll get the same 18 hours we’ve come to expect, but now with a larger charging coil, meaning you can juice it up to 80 percent in just 30 minutes.

Now, one of the coolest new features is sleep apnea detection—pending FDA approval. Using the Series 10’s accelerometer, it can monitor your breathing while you sleep and flag any signs of sleep apnea. If it notices something, you’ll get an alert and a detailed report to share with your doctor. Considering how challenging it is to diagnose sleep apnea without special equipment, this feature could be a game-changer.

Apple’s also made some hardware tweaks: the Series 10’s speakers are slightly smaller to extend battery life but don’t worry—audio quality hasn’t taken a hit. For the first time, the speakers can do more than just handle calls—they can now play music and podcasts directly from the watch.

If you’re a diver or love snorkeling, the built-in temperature and depth sensors will give you live updates on how deep you are underwater. Apple has also added its Tides app and improved paddling tracking for kayaking, all part of the new watchOS 11 software.

As for style, the Series 10 will come in various finishes, including a polished aluminum jet black, and a new lighter titanium option in natural, gold, and slate. Preorders start today, with the Series 10 hitting stores on September 20th. The price? It starts at $399 for the GPS-only model and $499 for the cellular version.

Speaking of watchOS 11, it’s loaded with fitness upgrades. There’s a new Vitals app to track things like heart rate and oxygen levels, plus a Training Load feature to help you know when to push or rest. Oh, and for those of us who live by our Activity Rings, you can now pause them—so taking a rest day doesn’t ruin a streak.

This 10th-anniversary release comes after years of Apple refining its smartwatch. When it first launched, the Apple Watch was more of a fashion statement and a handy iPhone companion. Fast forward to today, it’s a health and fitness powerhouse, thanks to its continuous hardware and software innovations.

The Series 10 builds on last year’s Series 9, which introduced the cool “double tap” gesture, making it easier to take calls with one hand, and the debut of the S9 SiP for faster Siri processing. And let’s not forget the Series 8’s additions like temperature sensors, Crash Detection, and the debut of the more rugged Apple Watch Ultra aimed at outdoorsy types.

With the Series 10, Apple continues to push the envelope, proving once again that it’s more than just a watch—it’s a must-have tool for fitness, health, and staying connected.

Updated 5:09 pm ET: Added link to sleep apnea detection feature in 4th paragraph.