The Sony Charging Case Black WF-1000XM4 is the specially designed charging case for the Sony WF-1000XM4 wireless noise-canceling headphones. This compact case provides secure storage and reliable charging options for the headphones, extending the operating time between charges. Made from durable materials, the charging case features a sleek black finish that complements the high-quality design of the WF-1000XM4 headphones. The case includes a built-in rechargeable battery that provides multiple additional charges for the headphones, significantly increasing total listening time. An integrated LED display shows the charging status and battery level. The magnetic lid ensures a secure closure during transport while allowing easy access when needed. The charging case supports USB-C connectivity for convenient recharging and features precise internal contacts that maintain optimal charging efficiency. With dimensions optimized for portability, this charging case fits comfortably in bags while providing robust protection for the headphones. The interior compartment is specifically designed to hold the WF-1000XM4 headphones with precise alignment for consistent charging performance. This charging case keeps the headphones in optimal condition during storage and transport, ensuring they remain ready for use. The product carries the manufacturer part number A5036913A and is made by Sony to complement the performance and design standards of the WF-1000XM4 wireless headphone system.