About this item Compatible Models: The case cover with lock is specially designed for the Fit Pro 2021 charging case. Not compatible with PowerBeats Pro 2019 and Studio Buds 2021; does not include charging case. Secure Lock Design: The protector features a 2-piece design with a safety lock function on the front. This lock securely holds the cover in place and allows you to open the top cover with one click, preventing it from accidentally opening and risking the loss of your Fit Pro while out. Carbon Fiber and TPU: The outer shell is made of durable TPU material, while the interior utilizes carbon fiber, which is five times stronger than steel. This combination ensures excellent wear resistance, toughness, and high strength. The TPU material also offers anti-aging, anti-scratch, and anti-shock properties, providing robust protection for your Fit Pro. Support Wired Charging: The case cover allows for wired charging without the need to remove the Fit Pro case; it can be charged directly,