Yes, the Garmin Approach G80 GPS golf handheld device can be used without a ball. While the device is primarily designed to provide golfers with data and analysis of their shots, it can also function as a standalone GPS device for golf courses. Golfers can use the G80 to view distances to the green, hazards, and other features on the course. Additionally, the device includes practice and training modes that allow golfers to work on their swings and improve their skills without hitting a ball. So, in summary, the Garmin Approach G80 can be used without a ball, and it offers a range of features that can help golfers improve their game.