Apple has unveiled the Apple Watch Series 12 and Ultra 4, featuring the new S11 chip, improved heart rate sensors, and a Health Sensing System. The watches measure heart rate every 5 seconds and track HRV 24 times more frequently. New features include a Readiness score and Health Age in the redesigned Health app.

Audio Intelligence uses a built-in microphone to alert users to important sounds and summarize conversations. Battery life reaches up to 50 hours on the Ultra 4 and 24 hours on Series 12. Both models are available for pre-order now, with prices starting at $399 for Series 12 and $799 for Ultra 4.