Available for individual sale. Earphones only, single earbud only, silicone ear tips only, the main unit only, etc. I bought these just a year ago, but the battery drains quickly. Please consider only if you understand this. Also, it is unclear whether the malfunction is due to the main unit or the earphones. I am listing these because I thought there might be people looking for a single earbud, ear tips, or who have lost the main unit. Small, lightweight, and ultra-fit. High-performance noise cancellation and high-resolution sound (*). * High-resolution sound fully wireless. When transmitting high-resolution content with the LDAC codec at a maximum transfer rate of 990kbps. Operation is required from the "Sound Connect (formerly Headphones Connect)" app. When purchased from the Sony Store: Sony Store offers a manufacturer's warranty of <3 years> 26,400 yen (tax included) Ultra-small and lightweight design for comfortable wear for extended periods Despite the noise canceling and high-resolution sound, the ultra-small and lightweight design, along with the reduced protrusion from the ear, brings the center of gravity of the earphones closer to the head, achieving stable wearability. In addition, the "Ergonomic Surface Design" increases the contact surface between the earphone body and the ear. The shape is designed to be less likely to interfere with the complex irregularities of the ear, allowing for comfortable use even for extended periods. More details here: Achieves both "listening while aware" with high-performance external sound intake and "immersion" with noise cancellation Equipped with "Ambient Sound (external sound intake) mode" that allows you to hear the surrounding sounds while listening to audio content. By increasing the amount of external sound intake in signal processing compared to previous models, more natural external sound intake is achieved. Furthermore, it is also equipped with a high-performance noise canceling function, achieving both high immersion when enjoying content. In addition, "Adaptive Sound Control" is also included, which automatically switches between noise canceling and external sound intake depending on the user's usage environment.