The SkyTrak Launch Monitor uses a plethora of technologies to help track your shot accurately, every time. What it tracks: Ball Speed: 0-200mph +/- 1mph Launch Angle: 0-55° +/- 1° Back Spin: 0-12,000rpm +/- 250rpm Side Spin: 0-4,000rpm +/- 250rpm Side Angle: 0-20° +/- 2° Dimensions: 5.75"(L) x 6.75"(H) …