A small, simple and largely automated video camera (you can also shoot stills) designed to attach to a helmet, handlebars, surfboard or any other kind of object and provide dramatic first-person video of adventure sports and other activities. Almost all use fixed focal length super-wide angle lenses and shoot 4K video, some offering even higher resolutions.
The best known examples are GoPro cameras, which are used by both amateurs and enthusiasts and professional adventurers and production companies. You can also get 360 cameras that capture a spherical view of the world which you can edit later into conventional ‘flat’ videos or use for immersive VR productions.