Snapdragon Sound and aptX Lossless Unlike SBC, aptX Lossless does not lose data when streaming and decoding, delivering high fidelity similar to the original recording. SoundPEATS Air4 Pro uses Snapdragon Sound and aptX lossless for CD-quality audio (16-bit, 44.1 kHz). Requires compatible Snapdragon Sound device. Immerse yourself in beautiful notes.Adaptive Hybrid Adaptive Active Noise Cancellation SoundPEATS Air4 Pro headphones combine advanced noise cancellation technology and high-performance processing for effective cancellation. They monitor and analyse external noise in real time, reducing interference and allowing you to enjoy your music or content to the fullest.Crystal-clear quality with AptX Voice SoundPEATS Air4 Pro uses AptX Voice technology for clear, lifelike calls. With 32 kHz sampling rate and 16 kHz flat frequency response, it captures sonic nuances, reduces distortion and ensures accurate and clear calls.13mm Dynamic Speaker The earbuds feature a 13mm speaker with bio-fibre diaphragm technology, pure wood pulp and PU for a clean and natural sound. This allows you to enjoy all musical elements, such as instruments and effects, in clearer detail. The audio quality is exceptional thanks to the design of the diaphragm and the materials used.Seamless Multi-Device Connection and Bluetooth 5.3 Connect two devices easily and switch between them without losing aptX adaptive lossless audio quality. Whether smartphone, tablet or laptop, stay connected without sacrificing quality. With Bluetooth 5.3, the SoundPEATS Air4 Pro features improved transmission, stable connections, lower power consumption and higher quality, providing convenience and user satisfaction.