The clear Lexan cover is designed to protect the display from debris. It covers the entire front and top of the unit and is secured with guide wires. Control buttons remain accessible. Please note, this shield is not intended to protect the chronograph from projectiles. The Lexan debris shield is designed for use with ProChrono models, providing robust protection against debris to ensure accurate and reliable performance The transparent Lexan cover effectively safeguards the display against debris, ensuring durability and maintaining optimal visibility for the user The unit's design features a protective covering that extends seamlessly across both the front and top surfaces, ensuring comprehensive safeguarding Secured firmly using the guide wires, the structure remains stable and aligned, ensuring optimal performance and safety throughout its operation The control buttons are designed to remain easily accessible at all times, ensuring seamless operation and user convenience without any obstruction This device is not designed to safeguard the chronograph against impacts from projectiles, and users should exercise caution to prevent such occurrences