Brand new, unused! Instant purchase welcome! 【Power Up】 Can play music for up to 6 hours; the earphones themselves last up to 4 hours on a full charge, and with the charging case, you can enjoy up to an additional 6 hours of music playback. 【Ergonomic Design】 Adopting a sports design based on ergonomics, each earbud weighs only 3.8g, perfectly fitting the shape of the ear, providing a comfortable fit and size, without burdening the ears. You won't feel the weight even when wearing them, and you can use them comfortably without worrying about them falling out while moving. 【IPX7 Waterproof】 IPX7 waterproof prevents water ingress, allowing you to wash them and protecting the earphones from sweat, splashes, and sudden rain. These are the perfect sports earphones for active scenes like sports and exercise. *Note: The charging case is not waterproof. 【Automatic Pairing & Memory Function】 The charging case has magnets in the storage area, securely holding the earphones and eliminating the worry of losing or dropping them. Furthermore, when you take the earphones out of the case, they automatically enter pairing mode, allowing for easy Bluetooth connection. Simply taking them in and out of the charging case turns the power on/off, and the pairing setting mode with the device automatically activates. No settings are required for the second use, as the device will be automatically recognized. 【Latest Bluetooth 5.3+EDR】 Features high-quality audio transmission within 10 meters. No sound skipping or interruptions. CVC 8.0 noise-canceling technology reduces noise, allowing you to concentrate on listening. Technical Conformity Mark (TELEC technical certification number: R210-187442), safe and secure to use. 1780r8816