Sennheiser Launches Waterproof Mic for GoPro HERO4 | GoPro
Amazon.com : Suptig Replacement Waterproof Case Protective Housing for GoPro Hero 4, Hero 3+, Hero3 Outside Sport Camera for Underwater Use - Water Resistant up to 147ft (45m) : Electronics
GoPro HERO4 Silver Digital Action Camera with Standard Housing, Quick Release Buckle {12MP} Waterproof to 131 ft. at KEH Camera
GoPro Launches HERO4 Session: the Smallest, Lightest and Most Convenient GoPro, Yet | GoPro
GoPro Hero4 Review for Underwater Video - Underwater Photography Guide