Tik Tok Sound Alerts Wrong Posture: Golf Swing Trainer elvow is an integrated alarm device made of special material that immediately produces a Tik Tok sound if you bend your elbow while swinging. You will be warned that your posture is incorrect you should adjust your posture to keep your left arm straight.Application: Thanks to the Tik tok sound of our golf trainer, golfers can detect the wrong curvature of their left arm to keep the left arm in a straight position thus, an effective and ideal strike can be formed gradually Suitable for all golfers or golf lessons especially for beginners.Posture Warning: During use, when the elbow is bent, it will issue a wrong posture warning for the golfer. Then correct yourself to stretch your arms so that you gradually achieve an effective slapping effect. Suitable for all golfers or golf instructors, especially for beginners.Breathable Material: Our golf swing training aid is composed of high-quality, breathable nylon cloth webbing and velcro fasteners, durable and lightweight it will not bring you pressure. With a high degree of flexibility, you can easily place your elbows in the armband to create and maintain the correct distance between your left foot and right knee.Not easy to replace, more warning: Compared with other suppliers who use a simple belt, our golf swing trainer is all at the elbow, our swing trainer is not easy to move, which can better warn the golfer . Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.