Apple's AirPods 4, released in late 2024, come in two versions: a standard model with Personalized Spatial Audio and a premium model with Active Noise Cancellation (ANC), Adaptive Audio, and a new H2 chip for enhanced sound, all featuring a contoured design, touch controls, USB-C case, water resistance, and longer battery life (up to 30 total hours). Key upgrades include the H2 chip, better battery, and improved audio for both models, with the ANC version adding advanced features like Conversation Awareness.