Excellent condition Only items shown in the photos are included. Brand: Sony (SONY) Model Name: WF1000XM4 BM Color: Gray Headphone Type: In-ear Connectivity Technology: Wireless Wireless Communication Technology: Bluetooth Other advancements: - IPX4 water resistance. Enjoy music without worrying about rain or sweat. - Improved connection stability with the integrated processor V1. - Improved battery performance. 8 hours of battery life for the main unit, 12 hours of charging with the case, for a total of 24 hours. Supports smartphone-based charging. - Significantly enhanced call performance. Advanced audio signal processing with four microphones and sensors. - Improved fit to the ear. Ergonomic surface design increases the contact area compared to previous models, achieving stable wearing. - Significantly improved noise cancellation performance. Achieves industry-leading noise cancellation. Significantly improved compared to WF-1000XM3. Wind noise is also significantly reduced. Noise canceling performance improved with the integrated processor V1, an evolved 6mm driver, and new ear tips. - Supports LDAC. Supports 360RA. Achieves overwhelming high-quality sound. Charging time: Approximately 1.5 hours Utilizing ear shape data from various countries, we have designed a shape that is less likely to interfere with the contours of the ear. We have created a holding method that conforms to the shape of the ear, supporting the earphone body with the contact surface inside the ear. Furthermore, the noise isolation ear tips provide holding power in multiple directions, achieving higher wearing stability and a comfortable fit. Popular model: Sony WF-1000XM4 Connection type: Wireless Features: Bluetooth Used only briefly after battery replacement. Returns are not accepted after purchase.