Golf ball marker level with green reader Clear convenience for putting accuracy. The level indicator is easy to read and shows the exact green angle, helping you judge your putting line and measure green inclination to reduce errors and improve oncourse performance. Better putting pattern. Use the ball marker level to read green inclination, control your speed, and adjust your stroke direction accordingly for more consistent results. Easy to use. Simply attach the golf ball marker level to your golf cap with the onthego clip, keeping it secure and ready so you can play without worrying about losing it. Wide application. This ball marker level with green reader measures the inclination angle of any sports surface. It is a multifunctional tool for outdoor activities on fields, basketball courts, football fields, and other surfaces. Use scenarios Practice green: before a putt, read the slope quickly to determine your line and speed, then adjust your stroke. Oncourse reading: during a round, use the device to gauge green inclination and refine your putting strategy on several holes. Coaching and training: use on grass or turf to compare slopes, optimize technique, and improve consistency for players of all levels.