The Knox Gear Silicone Charging Case is compatible with the Sony WF-1000XM4 Noise Canceling Truly Wireless Earbuds. This shockproof and durable case is designed to protect your earbuds from scratches and other damage. Includes Knox Gear 1-Year Limited Warranty, Cwrabiner locking clip for safety, and scratch & shockproof. It also includes a USB Type-C port for charging your case and earbuds (cable sold separately).