The rise of the ramp is the vertical dimension and the horizontal projection or run of the ramp is the horizontal dimension. If the slope of a ramp is between 1:12 and 1:16, the maximum rise shall be 30 inches (760 mm) and the maximum horizontal run shall be 30 feet (9 m).
GoPro, Inc. (formerly Woodman Labs, Inc), is an American manufacturer of action cameras, often used in extreme-action videography.
Batteries: Make Your GoPro Last. The most common and enduring complaint about GoPro cameras is that they chew through batteries. Unfortunately, shorter battery life is the cost of shooting large images at a high frame rate in a small camera. The Hero 4 gets about the same two-hour battery life as the previous models.