The main functions are direction determination and navigation. Direction Determination: Helps users understand east, west, north, south, and other intermediate directions. Navigation: Allows users to follow a specific route or direction. This is especially useful for activities such as hiking, camping, and scuba diving. In scuba diving: A compass worn on the wrist is an essential device for divers to maintain direction underwater, ensure safety, and return to the boat or shore. Design: Designed to be worn on the wrist, allowing for easy access and use while moving or when hands are occupied with other devices. The product is in good condition. Thank you for visiting.