• 【1BA + 1DD Hybrid design for more natural and realistic sound reproduction】The 10mm dynamic driver is equipped with EarFun's unique low-frequency enhancement technology "BassSurge" to powerfully reproduce deep mid-low tones Meanwhile, our proprietary ultra-compact balanced armature (BA) drivers deliver clear and vivid highs Furthermore, with the company-developed hybrid driver-specific tuning and new frequency division technology, the connection between high and low tones is surprisingly smooth Achieve a natural unity with seamless sound transitions, delivering a sound faithful to the original Unique off-axis placement acoustic construction (Nano Side-Fit Acoustic Architecture, NSAA) allows for precise positioning of dynamic and BA drivers in optimal positions even in limited housings Maximizing the potential of the hybrid configuration, it achieves both extreme sound quality and comfortable wear • 【Equipped with the latest QCC3091 chip & aptX Lossless & LDAC for Hi-Res sound quality】The latest Qualcomm chip QCC3091, fully integrating next-generation Bluetooth 6.0 and Snapdragon Sound By integrating the device and earphones into one, we have achieved the wireless ideal of high sound quality, stable connection, and low power consumption all at once Now supports aptX Lossless, enabling lossless transmission that can reproduce CD-quality signals without loss Supports high-quality codec LDAC with fast transmission of up to 990 kbps, which is more than three times the data volume of standard Bluetooth audio codec (SBC), and can also play high-resolution audio sources up to 24bit/96kHz It has also obtained the Hi-Res Audio certification from the Japan Audio Society ※ Please note: LDAC, aptX Lossless, and LE Audio are not available for use on iOS devices A compatible device is required If you want to use the codec on other devices from the iOS app, please contact our support • 【AI Adaptive Noise Canceling & Wear Detection Function】By combining QuietSmart 3.0 and AI adaptive hybrid ANC technology, we have achieved individually optimized noise canceling of up to 50dB, depending on the user and environment With the wear detection function, when you remove the earphones, the noise cancellation/external sound intake mode automatically turns off, and it turns back on when you wear them You can also set up automatic media playback/pause and automatic call answering in the app For accurate operation of the wear detection function, please use the optimal size eartips If noise cancellation fails or the music stops, please consider turning off this function while checking the wearing condition • 【Auracast compatible for easy audio sharing】Fully compatible with the next-generation Bluetooth audio standard "LE Audio" Its innovative feature Auracast allows you to share music like never before In airports and cafes, you can listen to TV audio and broadcasts with your own earphones, and easily share videos and music with family and friends Enjoy the new possibilities of wireless technology with the expanding compatible environments ※ To use LE Audio, a compatible device is required • 【Up to 54 hours of playback & Multi-point connection】The playback time of the earphones alone is up to 12 hours When used with the charging case, the total playback time can reach up to 54 hours Supports rapid charging, allowing for 3 hours of playback with just a 10-minute charge The charging case supports both wireless charging and USB-C charging Moreover, the EarFun Air Pro 4 Plus supports multi-point connection, allowing you to connect up to two devices simultaneously While listening to music on your PC, switch your smartphone calls smartly