[Upgraded Planar Magnetic Driver] STAX SPIRIT S5 utilizes planar magnetic drivers with EqualMass diaphragm for uniform driving force across the surface, ensuring original sound, low distortion, and fast response. Its second-gen upgraded EqualMass wiring structure enhances diaphragm stability across all frequencies with a symmetric layout. [CD Loseless Audio for Audiophiles] Powered by Qualcomm QCC5181 Bluetooth SoC platform and Qualcomm Snapdragon Sound tecnology, the S5 offers robust RF connection and lower power consumption for extended listening. It supports LDAC, LHDC, and all audio codecs within the Snapdragon Sound Technology Suite, including aptX HD, aptX Adaptive, and aptX Lossless. [Hi-Res Audio & Wireless Hi-Res Audio] With LDAC and LHDC, leading-edge high solution audio codec, S5 supports both Hi-Res audio and Hi-Res audio Wireless, offering an abundance of detail and clarity for the ultimate listening experience. [Multiple Connectivity Options] The STAX SPIRIT S5 features the latest Bluetooth V5.4, Google Fast Pair, USB-C and AUX cables for seamless connection. The Bluetooth V5.4 ensures a stable, smooth, and fast transmission connection, and enables simultaneous connection to two Bluetooth audio devices. With Google Fast Pair, it can quickly and effortlessly pair with your Android device under Bluetooth mode. With USB-C and AUX cables, it can be connected to all your devices. [Crystal Clear Calls & Low Latency] With dual-mic and Qualcomm cVc technology onboard, S5 actively suppresses ambient noise for enhanced voice clarity, delivering crystal-clear call quality wherever you are. The Closed-Back design ensures a private listening experience. Plus, the Qualcomm aptX Adaptive codec maintains the original high-resolution audio (up to 24-bit/96kHz) with minimal latency of just 89 ms end-to-end. [Long-lasting Comfort & Convenience] Enjoy up to 80 hours of continuous music playback on a single charge, with a speedy 10-minute charge giving you 11 hours of playback. The ergonomic design features adjustable headbands and genuine lambskin earpads for unparalleled comfort, while the foldable structure and carry case ensure easy portability and travel convenience. [Edifier ConneX APP] Explore the EDIFIER ConneX App for enhanced features such as personalized EQ, control options, and cushion settings. Choose from three preset EQ modes or tailor your own EQ settings to match your unique music preferences.