"Designed specifically for sports × doesn't easily slip off" - Earaku (Ear-a-ku)'s uniquely developed open-ear headphones "SoundFold J135" feature a cutting-edge 3D fit design, with an ultra-flexible silicone neckband and two ear hook points. This ergonomic three-point support provides maximum stability, ensuring a secure fit that won't slip even during running or weight training. The open-ear design of the SoundFold J135 allows you to stay aware of your surroundings while focusing on your workout. Furthermore, the listening style that doesn't cover the ears is a "non-fatiguing" design, perfect for those with sensitive ears or sports enthusiasts who use them for extended periods. Let's use the power of music to go faster and stronger. "Overwhelming sound quality × immersive listening experience" - These wireless earphones are equipped with extra-large 27mm drivers, about twice the size of comparable sports earphones in the industry, expanding the soundstage by 4.3 times. Furthermore, innovative 360 Reality Audio, LE Audio, AAC, and SBC decoding technology create a non-oppressive listening style where the speakers seem to float in front of your ears, providing a pleasant running experience as if you were floating. The DSP amplifier also optimizes sound balance, with powerful bass and clear mid-high tones in exquisite harmony, creating a dynamic audio performance. "Can connect to two devices simultaneously" - These open-ear headphones support multi-point connectivity, allowing simultaneous connection/standby with two devices, such as a PC and a smartphone. You can answer calls on your smartphone during an online meeting on your PC, play music on your smartphone during your commute, and then use your PC for online meetings after arriving at work, all without having to switch Bluetooth connections. They also support multi-point connection, allowing you to connect to two devices simultaneously. "Excellent sweat resistance and durability" - Did you know that the salt and oil in sweat can seep into the earphones and cause malfunctions? To create true sports earphones, Earaku has adopted high-density nano-coating technology and reinforced UV resin, and has conducted a continuous 62-hour salt spray test, exceeding industry standards. "23 hours of continuous playback & low-latency wireless"