1. [Application]: Through the sound of our golf training aid, golfers can detect their left arm curvature error in order to keep the left arm in a straight position; Therefore, an effective and desired blow can gradually be formed; Suitable for all golfers or golf lessons, especially beginners. 2. [Sound Prompt Incorrect Posture]: The golf swing trainer is an integrated alarm device made of special material that immediately generates a sound when you bend your elbow while swinging. It alerts you that you are not in the correct posture; You should adjust the posture and keep your left arm straight. 3. [Adjustable and easy to carry]: Strong Velcro and buckle make the golf training aids swing adjustable, easier to put on and take off; The thick plastic buckle does not scratch the skin like other thin metal buckles; It suits most people's arm. 4. [Not easy to change and better to warn]: Compared to other suppliers which is a simple belt, our golf swing trainer is around the entire elbow, ours is not easy to move and it can better warn golfers 5. [Breathable material]: Our golf swing training aid is made of , breathable nylon cloth and webbing and Velcro fastener, is durable and light; It won't pressure you. 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. Sold by-Minnanxin