Purchased from Amazon, brand new and unused. Sleep Headphones Type-C Earphones, Type-C Wired, Sleep-Use, Soft Silicone, Soft, Ultra-Lightweight, Ultra-Small, External Noise Isolation, Good Sound Quality, Remote Control, Microphone Included, Ideal for Sleep, Work, Study, Commuting 【Small and Comfortable to Wear】 This is a new type of sleep headphone. Due to its small size, it's comfortable even when sleeping on your side, and it won't hurt your ears even after wearing it for a long time. The soft silicone material fits the shape of your ear and is designed to stay in place. 【HIFI Unit Moving Coil Speaker】 Adopts a powerful and ultra-thin graphene diaphragm to improve sound resolution and provide high-fidelity sound quality. A team specializing in sleep scene optimization has made adjustments for multiple optimizations, with low frequencies, smooth mid-range frequencies, and clear high frequencies. High-purity copper core wire, flexible and durable, anti-tangle, pure sound delivery, and effective noise filtering are enhanced. 【In-line Control Sleep Headphones】 The cable is equipped with a remote control with a microphone and multi-function buttons. You can easily answer, reject, and end calls, and play, pause, and skip music without picking up your phone. - Model Name: S10 - Speaker Size: 6mm - Impedance: 16Ω±15% - Frequency Response: 20-20kHz - Cable Length: 1200mm - Type: Type-C - Features: With remote control and microphone Thank you.