Snapdragon Sound & aptX Lossless : Unlike SBC, aptX Lossless ensures no audio data loss in transmission and decoding, offering higher fidelity audio akin to the original recording. SoundPEATS Air4 Pro uses Snapdragon Sound technology and codec audio aptX adaptive lossless to elevate your audio experience to a new level, allowing you to enjoy 16-bit 44.1k - Hz CD-level lossless sound quality and immerse yourself in unparalleled beautiful notes. - PEATS Air4 Pro earphones seamlessly blend advanced noise-cancellation technology, adaptability, hybrid noise reduction, and a high-performance processor to deliver exceptional noise-cancellation capabilities. These headphones continuously monitor and analyze real-time external environmental noise, generating counteractive sound waves to effectively diminish or eliminate interference, allowing you to fully immerse yourself in your music or content. Crystal-Clear Quality with AptX Voice : SoundPEATS Air4 Pro boasts AptX Voice technology, delivering exceptional high-definition sound quality. With support for a 32k - Hz sampling rate and a flat 16k - Hz frequency response, it captures nuanced sound distinctions for authentic and lifelike call audio. This technology effectively mitigates audio distortion, ensuring precise and clear calls, reducing communication misunderstandings. 13mm Dynamic Driver : This eabuds is equipped with a 13mm dynamic driver, which uses ultra-fine biological fiber, pure wood pulp fiber and PU diaphragm design to make the sound clean and natural, allowing you to deeply immerse yourself in various elements of music, including instruments, sounds, and effects. The material and design of the diaphragm help distinguish details in the audio signal more clearly, such as notes and tones in music, providing a higher quality audio experience. Seamless Multi-Device Connection & Bluetooth 5.3 : Easily connect two devices and switch between them effortlessly while retaining the superior sound quality that defines aptX adaptive lossless. Whether it's your smartphone, tablet, or laptop, stay connected without sacrificing superior audio performance. With Bluetooth 5.3, SoundPEATS Air4 Pro earbuds enhance audio with faster transmission, stable connections, lower power usage, and improved quality for user convenience and satisfaction.