Features: Quality button board, perfectly compatible for original machine, ensuring button sensitivity and stability. Made from durable materials, scratch resistant, wear-resistant, and resistant to deformation after long-term use. Precised designing, reasonable button layout, and more convenient operation. Easy to install, no need for professional skills. Great replacement part for your broken or worn out one. Specifications: Material: Printed Circuit Board Model: for 550D, for 600D, for 450D, for 500D (optional) Applicable Model: for 550D, 600D, 450D, 500D Sports Cameras Package Includes: 1x Key Button Flexible Cable Board note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.