Features: Color: Black Diameter: 35 * 7cm Package weight: 32g / piece Scope of delivery: 1x sliding training equipment [Application]: With the sound of our golf training aid, golfers can detect errors in left arm bending Compatible with keeping the left arm in a straight position; There Compatible with an effective and desired stroke can be gradually formed; Suitable Compatible with all golfers or for taking golf lessons, especially beginners [Audible signal Incorrect posture]: The golf trainer elvow is an integrated alarm device made of special material that immediately generates a tick-tock sound when you bend your elbow during the swing. It warns you that you are not in the correct posture; You should adjust the posture and keep your left arm straight [Adjustable and easy to carry]: Strong velcro and buckle make the golf training aid adjustable, easier to put on and take off; The thick plastic buckle will not scratch the skin like other thin metal buckles; It fits most people's arms, elbow circumference up to 33 cm [Not easy to change and better to warn]: Compared with other suppliers who are a simple belt, our golf trainer is around the entire elbow, ours is not easy to move and it can warn golfers better [Breathable material]: Our golf training aid is made of high-quality, breathable nylon fabric + webbing + velcro, is durable and lightweight; It will not put you under pressure