JBL SOUNDGEAR SENSE Black Ear Cuff Type True Wireless Earphones Brand New, Unused I opened the box to check the contents, but it is brand new and unused. These are "while-listening" earphones, selected as the No. 1 Best Buy of 2023 by "Kaden Hihyo" (Home Appliance Review). These are open-ear earphones that do not completely block the ears. You can hear the surrounding sounds while listening to music, so they are said to be suitable for running, etc. Type: Earwear True Wireless Earphones Bluetooth: Version 5.3 (LE Audio compatible) Driver Unit: 16.2mm diameter dynamic driver Frequency Response: 20Hz-20kHz Supported Codecs: SBC, AAC, (LC3 compatible) Waterproof Rating: IP54 (earphones only) Continuous Use Time: Approximately 6 hours for the earphones + approximately 18 hours using the charging case = up to approximately 24 hours. Supports quick charging (approximately 4 hours of playback with a 15-minute charge) Accessories: USB Type-C charging cable, detachable neckband