New, Unused, Free Shipping (Simple Packaging, Mail Delivery) Price is not negotiable. Color: Black 【Air Conduction Technology】 This technology transmits sound in a specific direction, accurately delivering sound to the eardrum and then to the auditory nerve from the speakers near the ears. This is the mechanism behind air conduction earphones, which don't block the ears but still minimize sound leakage. Because they don't block the ears, you can still clearly hear ambient sounds (car sounds, traffic signals, emergency vehicle sirens, etc.) while listening to music. You can always be aware of your surroundings during sports like running and jogging. 【One-Touch Operation & Independent Left/Right】 The multi-function touch buttons on the ear allow you to easily control music playback/pause, answer/end/reject calls, and activate SIRI, all with ease. Operation is possible with one hand. You can use either the left or right earbud independently, even if the other is in the charging case. You can enjoy music with one earbud while charging the other. 【Bluetooth】 Version 5.4 is used, enabling faster and more stable communication, greatly improving connectivity and reducing "skipping" and "dropouts." 【Ultra-Lightweight & Compatibility】 Each earbud weighs only 7.3g, making them comfortable to wear for extended periods. The ergonomic design and secure fit ensure that the wireless earbuds won't fall out during exercise. They are so lightweight you'll forget you're wearing them, perfect for activities like running. They also have comprehensive compatibility and can be used with Bluetooth-enabled devices such as iPhones and Android smartphones. 【Long-Lasting & Type-C Charging】 The case has a built-in 500mAh large-capacity battery, which can charge the earbuds multiple times. The input terminal uses Type-C for efficient charging. Suitable for commuting, going to school, work, and video calls. 【Package Contents】Earbud unit, charging case, charging cable, instruction manual. 【Main Specifications】 Communication Distance: 10m Supported Profiles: A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3 Waterproof Level: IPX5 Case Battery Capacity: 500mAh Earbud Battery Capacity: 45mAh Charging Time: Approximately 1.5 hours Music Playback Time: Approximately 7-8 hours Voice Call Time: Approximately 7-8 hours Standby Time: Approximately 90 hours