1、WATERPROOF UP TO 40 METERS: The solid back cover for GO3S provides professional grade waterproofing, pressure resistance, and protection against leaks, ideal for activities like swimming, diving, and surfing for underwater photography. 2、ROBUST EXTERIOR SHELL: Designed to effectively protect your device in complex underwater environments, the use of 304 stainless steel for buttons ensures precise alignment and a noticeable tactile feel. 3、HIGH DEFINITION LENS: Featuring a high transparency lens made of toughened glass, capturing clear and vibrant images with the waterproof case while retaining the integrity of the captured scenes. 4、BUILT IN SPONGE STRIP: The sealing gasket prevents leaks and water ingress, tightening with increasing water pressure. The built n sponge strip stabilizes and protects the screen from damage due to external pressure. 5、FLOATING BAR FILTER COMPATIBILITY: You can pair it with a buoyancy bar to apply (not included) for effortless underwater selfies and also available with filters (not included) to enhance image quality for higher photo output rates.