Adaptive Active Noise CancellationAfter the noise reduction is turned on, the SoundPEATS Air4 wireless earphones will automatically adapt to your ear canal, dynamically detect changes in environmental noise and wearing status, and dynamically adjust and match the most suitable noise cancellation parameters in real time. The maximum depth of noise reduction can reach up to 45dB (according to data from Qualcomm laboratories), providing you with an optimal noise cancellation experience. aptX Lossless TransmissionSoundPEATS Air4 supports Qualcomm aptX Lossless codec, along with compatibility for aptX AdaptiveHD, aptX Low Latency, and aptX HD audio decoding. It supports a transmission rate of 24-bit/96kHz. The leading aptX Lossless transmission technology enables ultra-fast and ultra-high bandwidth sound processing, delivering each musical note with precision to your ears. This achieves wireless lossless audio quality, allowing you to effortlessly enjoy CD-quality sound. 6-mic CVC Call Noise Reduction & 26h PlaytimeThe powerful 6-mic system of SoundPEATS Air4, combined with CVC noise-cancellation algorithm, ensures clear communication even in noisy environments, allowing for effortless and smooth conversations. With the charging case, it provides a long-lasting battery life of up to 26 hours, allowing for uninterrupted listening even during extended daily use. Bluetooth 5.3 & Multipoint ConnectionSoundPEATS Air4 utilizes an advanced Bluetooth 5.3 chip, offering faster data transmission speeds, lower power consumption, and improved connectivity stability. With a single pair of headphones, you can simultaneously connect to two devices such as smartphones, tablets, smartwatches, without the need for reconnection