B0919VZQS2 Lifoto Dome Port Lens for GoPro Hero 9 Black, Waterproof Housing Case Hand Floating Grip Trigger Transparent Cover Underwater Diving Photography

Moving the waterline away from the lens makes it possible to capture images both above and below the water simultaneously.
Simplicity of operation, nearly infinite depth of field, wide-angle lens. Waterproof depth up to 30M,Light transmittance is up to 93%.
8 inch Light-weight Floating Hand Grip w/ 1/4 Standard Screw Hole. Super-Comfortable Grip, excellent soft touch, skidproof and labor-saving.
Hand Grip can be unscrewed to reveal a hollow compartment that can be used to add water (to achieve neutral buoyancy underwater) or store small items. Anti-fog Inserts Preventing your camera housing from fogging. Dry it naturally, reusable.
Floating in Water/Use in Land. Equipped with a shutter trigger button for quick operation Adjustable Wrist Strap provides greater Security of your Action Camera