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Amazon.com: Hero 4 Microphone Compatible with GoPro Hero 4 Silver Black White Edition, Hero 3, and Canon Nikon Camcorder DSLR Camera - External Lavalier Lapel Mic : Electronics
GoPro HERO4 Silver Digital Action Camera with Standard Housing, Quick Release Buckle {12MP} Waterproof to 131 ft. at KEH Camera
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GoPro Hero4 Black review: Smooth 4K video that's still the best in the category - CNET
REVIEW: The GoPro Hero 4 Camera | Backpacker Banter
GoPro Introduces HERO4: The Most Powerful GoPro Lineup, Ever | GoPro
GoPro Hero4 Black review: Smooth 4K video that's still the best in the category - CNET
GoPro Launches HERO4 Session: the Smallest, Lightest and Most Convenient GoPro, Yet | GoPro