Feature: 1. for 6inch dome port can move the away from the lens makes it possible to capture images both above and below the water simultaneously. 2. Comes with trigger grip, convenient to trigger the shutter button.Can be used separately. 3. 2.3mm ultra thin transparent ball cover, light transmittance is up to 93%.100% reproduction of the environment, clear and colorful. 4. No front screen hole, will not reflect light on ball cover and affect the image.Reserved camera button, the camera can be easily switched on and off while underwater. 5. Made of quality plastic+Acrylic, small size and , easy to carry during travel.Stronger housing, sealing test, waterproof depth up to 30M. : Dome Port Diameter: 6inch (180mm) Waterproof: 98ft (30 meters) Compatibility: For Action 3 4 Material: Acrylic + plastic colour: Yellow+black Package Contents: 1 x Waterproof Case kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.