Clamp: Aluminum alloy CNC made high quality and security smartphone tripod mount adapter. CNC machined from aerospace aluminum alloy. Compatible with SeaTouch 4 housing for all smartphone. With 2X M6 Mount on top and 2X 1/4 mount at the bottom, you can fix the smartphone housing with any kind of video light you prefer, or mount the housing with trays and handles for the diving clamp Red Filter : Enhances contrast and improves the color of blue water to give your subject a rich, natural tone