Although it is new and unused, it has been opened once. Product Description ★【Equipped with HIFI High-Quality Sound Driver】Adopting a 14.2mm large-diameter driver, it achieves clear high frequencies, transparent mid-range frequencies, and rich low frequencies, delivering a well-balanced and immersive sound to your eardrums. It is ideal for music, video viewing, and games. ★【Clear Voice Calls】Equipped with 4 microphones and ENC call noise cancellation function, it suppresses surrounding noise when making calls in noisy places like train stations, sending your voice more clearly to the other party, and achieving clear calls. Makes voice calls, telework, and remote meetings more comfortable. ★【Lightweight and Compact & Comfortable Fit】Each earbud weighs only 5.2g, and simply placing them in your ears provides a comfortable fit without the stress of earplugs. The slim square case fits easily in your pocket and is easy to carry. ★【Long-lasting Continuous Playback】The earphones can play continuously for 4.5 hours on a single full charge. Furthermore, when used with the charging case, they can be used for up to 18 hours. You can use them without worrying about running out of battery even when going out for a day. By adopting Type-C charging, it only takes one and a half hours to charge the case. ★【IPX5 Waterproof and Sweatproof】Protected against harmful effects from strong direct jets of water from any direction. Achieves waterproof and sweatproof performance that can withstand sweat during sports such as running and gym workouts, humidity in the bath, and use in light rain. *Note: The charging case is not waterproof. No.7-617