Active Noise Cancellation (ANC) — Apple claims for these the “world’s best in-ear ANC”, removing up to 2× more unwanted noise than the previous AirPods Pro 2, and 4× more than the original AirPods Pro. The Guardian+3Apple+3Apple+3

Sound & Audio Architecture — These use a new multi-port acoustic architecture, with improved bass response, wider soundstage and better vocal clarity. Apple+2Apple+2

Fit & Ear Tips — Apple says they redesigned the internal architecture and ear-tips: the earbuds are smaller, more stable in-ear, and come with five sizes of silicone+foam-infused tips (including XXS) for better seal and comfort. Apple+1

Heart Rate Sensing & Fitness Integration — For the first time in the Pro line, these come with a custom heart-rate sensor (photoplethysmography/PPG) and integration with Apple’s Fitness app to track workouts and calories burned. Apple+1

Durability & Resistance — Rated IP57 (for dust + water resistance) making them more robust for workouts, rain or sweat. Apple+1

Battery Life — With ANC turned on, Apple states up to 8 hours of listening on a single charge (plus additional charges from the case). Apple+1

Additional features — Live Translation (for supported languages/regions), improved transparency mode, better microphone performance for calls, and enhanced spatial audio/head-tracking. Apple+1