【HIFI Unit Moving Coil Speaker】 Adopting a powerful and ultra-thin graphene diaphragm, it enhances sound resolution and delivers high-fidelity sound quality. A team specializing in sleep scene optimization has made multiple adjustments, resulting in low frequencies, smooth mid-frequencies, and clear high frequencies. High-purity copper core wire enhances flexibility and durability, prevents tangling, delivers pure sound, and effectively filters noise. 【Small and Comfortable Fit】 These are new-type sleep headphones designed to fit Asian ears. Due to their small size, they are comfortable even when sleeping on your side, and they won't hurt your ears even after long periods of wear. The soft silicone material fits the shape of your ear and is designed to stay in place. 【Wide Compatibility】 These earphones, which use a 3.5mm audio jack, have a cord length of 1.2m and are compatible with desktops, mobile phones, MP3 players, MP4 players, iPhones, Samsung devices, LG devices, iPads, and more. ※ Note: An additional Lightning to 3.5mm jack adapter cable is required for iPhone 7 and later models. 【In-line Control Sleep Headphones】 The cable is equipped with a remote control that includes a microphone and multi-function buttons. You can easily answer, reject, and end calls, as well as play, pause, and skip music without taking out your phone.