If you’ve had your eye on a new Apple Watch Series 10, now’s the day to finally get one. Not only is it $100 off, starting at just $299 for the 42mm model, but the blood-oxygen sensor is finally working again.

Apple has issued an update to the iPhone and Apple Watch with a “redesigned blood-oxygen feature” that measures and calculates sensor data on a paired iPhone. Apple turned off the blood-oxygen sensor last January amid a patent dispute with medical tech company Masimo, so this marks the first time Series 10 users have gotten it.

Aside from the new feature, Apple Watch Series 10 is as gorgeous as ever, with a sleek design and an impressive always-on retina display. These details and the faster charging speed were all on our “pros” list when we reviewed the Watch and gave it a 4.5-star rating and our Editors’ Choice award. The smartwatch can keep you connected to the notifications on your phone, make calls, control music playback, track your fitness activity, run ECGs, talk to Siri, and perform dozens of other features. It also comes with Fall Detection and Crash detection, as well as Emergency SOS if anything goes wrong.

So take advantage of this $100 discount and get started with the Apple Watch Series 10 for $299 at Amazon.