Features: Abandon the traditional and cumbersome installation method, just install it and use it. Double for protection of the door bolt and bumper ball, refuses to be insecure. Keep the go-pro two-corner interface to connect more accessories, such as tripod/selfie stick/headband, etc. Double cold boot opening design, random match, unlock more ways to for play. The side hole is reserved, and the battery/memory card can be recharged without opening the cover. Specifications: Material:Aluminum Alloy Size:Approx.8.2x3.5x7.5cm/3.23x1.38x2.951inches Color:Gray For HERO-9 Package Includes: 1 Set for Protection Frame note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.