The WP-DC27 Underwater Case has been specifically designed for the Canon PowerShot SD990 IS Digital Camera and is waterproof down to the depth of 130 ft. (40m). This clear and durable polycarbonate case shields your digital camera as you explore your underwater surroundings. A tight O-ring main seal with safety lock, along with stainless steel and nickel-plated brass hardware, help to ensure protection from corrosion for years to come. A fluorite (FL) glass window gives your digital camera's high quality Canon lens the protection and clear view it needs to deliver crisp detail and vibrant color. A flash diffusion plate allows you to use your camera's internal flash. The Canon Digital Underwater Housing gives you full control over your camera. It features a large, responsive shutter button, precision zoom lever, and durable controls to give you access to everything your Canon digital camera has to offer. This waterproof housing is even great above water for skiing, fishing, boating, and more.