Instant purchase welcome＊ Follow-up discount available ◎ #ksk product list is here Only one available! (Since it's also listed elsewhere, it's first-come, first-served) Brand new and unopened. Please check within 3 days of arrival, and if there are any issues, please contact us before leaving a review. 【Authentic Audio Device】 Equipped with cutting-edge technology to enhance sound purity. With 16-channel detailed audio processing, it individually adjusts sounds from low to high frequencies, achieving balanced, clear, and natural sound quality. Furthermore, it effectively suppresses noise and ambient sounds, highlighting important sounds. 【Clarity and Comfort of Sound】 Features advanced noise reduction and shock prevention systems. Equipped with directional dual microphones, it captures clear sound even in the presence of background noise or distance. In addition, innovative no-delay technology eliminates sound distortion and minimizes latency. 【Enjoy Calls/Music/Videos More Freely】 Built-in Bluetooth 5.3 chip, smoothly connects with iOS and Android devices. You can enjoy calls, music, and videos comfortably in conjunction with smartphones, etc. It maintains a stable connection within a communication range of up to 15 meters and can connect to two devices simultaneously for seamless switching. 【Comfortable Fit】 Fits comfortably in the ear and can be used comfortably even with glasses. Comes with 3 pairs each of breathable and sealed ear tips (L/M/S), a total of 6 pairs, allowing you to choose according to your preference. The ear tips use nano-coating technology to prevent damage from moisture and increase durability. In addition, the product itself has IPX5 waterproof and sweat-proof functions, allowing you to enjoy music and conversations comfortably during exercise or on rainy days. 【Long-lasting Use and Fast Charging】 Can be used for up to 12 hours on a single charge, and with the fast charging function of the charging case, you can use it for an additional 3 hours with just 10 minutes of charging. The charging case can fully charge the main unit twice when fully charged, allowing for a total of up to 36 hours of continuous use. The charging case has a light that indicates the battery level, so you can check the remaining battery at any time. 【Personal Sound Experience Achieved with the App】 Customize the optimal audio experience with the dedicated app. High-performance noise canceling and scene mode switching functions provide an immersive experience regardless of the environment. Furthermore, you can finely adjust the sound quality with the equalizer and left/right independent 10-step volume adjustment function.