Form factor: In-ear true wireless earbuds. Each earbud is compact — about 30.2 mm tall, 18.3 mm wide, 18.1 mm deep.
Included items: AirPods 4 earbuds + charging case (USB-C, wireless charging compatible) 
Connectivity: Bluetooth (seamless pairing with Apple devices; supports full suite of Apple audio features) 

Sound & ANC / Audio Features

• Active Noise Cancellation (ANC): This model supports ANC — helping to reduce ambient/external noise before it reaches your ears, for more immersive listening. 
• Adaptive Audio & Transparency Mode: The earbuds seamlessly blend ANC with a “Transparency mode,” which lets you hear the world around you when needed (for example: conversations or environmental awareness) while offering the benefit of noise control. 
• Personalized Spatial Audio with Dynamic Head-Tracking: Sound is positioned around you in 3D space, creating a “theatre-like” listening experience for music, movies, games — particularly effective when watching video/film content.
• Voice Isolation & Improved Call Quality: For phone calls or voice chats in noisy environments, these AirPods prioritise your voice and suppress background noise for clearer speech. 

Battery & Charging

• With ANC enabled, the earbuds deliver up to 4 hours of listening time on a single charge. 
• With the charging case, total listening time can reach up to ~20 hours (ANC on + recharges) per full cycle.
• The charging case supports USB-C charging as well as wireless charging (Qi-compatible) — convenient for desk, travel, or on-the-go top-ups. 

Smart & Convenience Features

• Automatic in-ear detection: Plays audio when earbuds are in your ears, pauses when removed. 
• Quick-press controls: Manage music playback or calls with simple taps. 
• Seamless pairing & ecosystem integration: Especially smooth pairing with Apple devices — ideal if you're in Apple’s ecosystem. 
• Portability: As buds + case they’re compact and travel-friendly, easier to carry than bulky over-ear headphones. 

Features

• Effective ANC for in-ear earbuds — good for commuting, public transport, office noise, cafes, etc.
• Adaptive audio + transparency gives flexibility: you get noise cancelling when you want isolation, but can stay aware of your surroundings when needed (safety, conversations, etc.).
• Spatial audio + dynamic head tracking makes immersive media consumption (movies, series, gaming) more engaging.
• Light and portable: better if you want convenience and mobility rather than bulky over-ear headphones.
• Great for calls in noisy environments due to voice isolation.

AirPods 4 are your only choice if you:

• Want a compact, portable ANC solution rather than bulky over-ear headphones.
• Use Apple devices (iPhone, iPad, Mac) and want seamless integration + smart features.
• Frequently switch between noise isolation and awareness (e.g. commuting, walking outside, quick conversations).
• Enjoy movies, games, or immersive content and want spatial audio.
• Make calls in noisy environments (commute, café, outdoors) and want decent voice clarity.