Apple unveiled the fourth generation of its wireless AirPods 4 last evening, introducing two models with different features and varying prices.

Two models: the basic at $129, and the other with active noise cancellation at $179.

Improved sound quality: with dynamic head tracking for a more immersive listening experience.

H2 chip: provides support for features such as voice isolation and interaction with Siri voice assistant.

Advanced control: a pressure sensor on the stem for controlling media playback and ending calls.

Smaller charging case: equipped with a USB-C port and provides battery life of up to 30 hours.

Multiple charging options: ability to charge using an Apple Watch charger or any Qi-certified charger.

Improved design: for greater comfort and fit for more users around the world.

Additional features for the advanced model

Active noise cancellation: with improved microphones and advanced audio processing.

Transparency mode: to hear surrounding sounds when needed.

Adaptive audio: to automatically adjust audio settings according to the environment.

Conversation awareness: to improve voice call quality.

AirPods 4 are now available for pre-order in the United States, and will be available for sale starting September 20.