SkyTrak is completely portable and can be used both indoors and outdoors on a mat. If you’re using the system indoors, then you’ll need to use a hitting net. The system has an internal battery providing over 4 hours of use when fully charged and wirelessly connects to your Mobile Device. Outdoor performance may vary in certain lighting conditions. Avoid the sun shining or reflecting directly into the lens of the SkyTrak device. You should use new, or relatively new, quality distance, performance or Tour type golf balls in good clean condition. The type and condition of the ball you use will affect ball flight data, most noticeably ball speed and spin. Ball imperfections, mud, excessive markings, cut covers, and/or otherwise identifiable markings on the ball, etc. can affect SkyTrak’s dimple recognition capability, making ball data difficult to analyze.