Amazon offers the
GoPro Hero4 Session HD Waterproof Action Camcorder, model no. CHDHS-101, with a $40 Amazon Gift Card for $275 with free shipping. (Scroll down to "Special Offers and Product Promotions" and click "Add Both To Cart".)
At 2.6 oz., this camcorder is 50% smaller and 40% lighter than other Hero4 cameras and can be controlled via the WiFi remote (not included) or GoPro App. It features video recording at resolutions up to 1920x1440 (at 30 fps, 1080p at 60 fps), 8-megapixel camera with burst and time lapse modes, waterproof housing (up to 33 feet), dual microphones, microSD card slot, WiFi, and Bluetooth.