【Listen While Doing, Open-Ear Headphones】 This product is a completely wireless air conduction earphone. Air conduction earphones are a new product that has been upgraded to the second generation, receiving technological innovation from bone conduction earphones. While utilizing the features of bone conduction earphones, such as the open-ear design that doesn't enter the ear, it improves issues like "not being able to hear unless you get used to the vibration," "fast power consumption," and "heavy body," making it gentle on the ears. Because it doesn't cover the ears, you can enjoy music while listening to the surrounding sounds. By wearing open-ear headphones, you can get your own personal background music while working. Yes, there are no limits to the possibilities of open-ear earphones. Furthermore, the earphones are equipped with a "sound leakage suppression mode" and have high directivity, so they are designed to reach only your ears. You can enjoy an open feeling without worrying about the surrounding environment. 【Type-C Fast Charging & Up to 20 Hours of Continuous Use】 The air conduction Bluetooth earphones have a built-in high-quality battery and can be used continuously for up to 20 hours. You can use them anytime, anywhere without worrying about the battery level. Furthermore, it supports the mainstream Type-C fast charging, and just 10 minutes of charging allows for up to 1.5 hours of music playback. This makes it possible to enjoy music all day long, or watch games and dramas without any problems. 【Lightweight Design at Just 18 Grams & IPX7 Waterproof】 The air conduction earphones weigh only 18g, so you won't feel any pressure on your ears and won't feel tired even after wearing them for a long time. You can start a new day with music by listening to your favorite music while commuting to work or school. Equipped with IPX7 waterproof performance, it is protected from sweat and splashes, so you can use it with peace of mind even if you get caught in a sudden rain or sweat during intense exercise. Ideal for jogging, running, yoga, sports, fitness, cycling, etc. 【More Stable Connection & Faithful Sound Reproduction】 The earphones, equipped with a noise-canceling microphone, allow for clear and high-quality calls even during exercise or walking. Furthermore, it is equipped with the latest Bluetooth 5.3 chip, providing a more stable connection and low-latency mode. Y013