【Product Name】 Bone Conduction Wireless Earphones (Bluetooth 5.4 / Black / Large Capacity Battery) 【About Purchase】 ・Instant purchase is possible without comments. ・Discounts and bundle discounts are not available. 【Product Overview】 These bone conduction earphones allow you to enjoy music and calls without blocking your ears. Equipped with Bluetooth 5.4, they offer improved communication speed, connection stability, and power saving. They are safe and comfortable to use in various situations, such as commuting, going to school, running, gym training, and outdoor activities. Sound leakage has been reduced by approximately 50% compared to previous models, providing a more natural and clear listening experience. 【Features】 Safe Design That Doesn't Block Ears Bone conduction allows you to listen to music and calls while still hearing ambient sounds, ensuring safety in the city and during exercise. Bluetooth 5.4 Stable connection even in environments with interference. Significantly improved communication speed, range, and power efficiency. Sports-Oriented Fit Soft yet secure hold, designed to stay in place during running and weight training. Long Playback & Large Capacity Battery ・Earphones only: Up to approximately 5 hours of continuous playback ・Combined with charging case: Up to approximately 120 hours of use ・Charging case capacity: 2200mAh (can also charge smartphones) Easy Operation & Automatic Pairing Music playback, pause, track forward/backward, volume adjustment, and call operations can be done with one hand. Automatically connects by simply opening the case after the first connection. 【Specifications】 ・Color: Black ・Bluetooth Version: 5.4 ・Charging Case Capacity: 2200mAh (can charge earphones approximately 25 times) ・Continuous Playback Time: Approximately 5 hours (earphones only) ・Maximum Usage Time: Approximately 120 hours (with case) ・Charging Method: USB Type-C 【Set Contents】 ・Bone Conduction Wireless Earphone Body ・Charging Case ・USB Type-C Charging Cable ・Japanese Instruction Manual ※Simple packaging without an outer box to reduce costs. 【Shipping Method】 ・Yu-Packet Post (with tracking number) 【Notes】 ・Be sure to charge the earphones for the first time upon arrival. ・Please contact us before leaving a review if there are any initial defects.