No, you can't! The OptiShot 2 has been specially designed for playing indoors. As a result, you cannot use it under direct sunlight. You should use it in a condition where there is proper lighting for its infrared sensors to work and function and provide accurate club swing data. In case you observe that your system is giving you inappropriate or inaccurate data, that may indicate that your room lighting is not up to the mark, and you should make the required changes to fix the issue.