[Breathable Material]: Our golf training aid swing is made of high quality breathable nylon fabric + webbing + Buckle fastener, durable and lightweight; It won't add any pressure to you[Tik-Tok Sound Prompt Incorrect Posture]: Built-in alarm device made of special material immediately emits a Tik-Tok sound when you bend your elbow while swinging golf. It is telling you that you are not in the correct posture. You should adjust the posture and keep your left arm straight[Not easy to switch and better to warn]: Compared to other sellers who are a simple belt, our swing compatible with golf training aid is around the entire elbow, our swing is not easy to move and can do the Better warn golfers[Adjustable and easy to carry]: Thanks to the strong Buckle fastener and the buckle, it is adjustable and easier to put on and take off. The thick plastic buckle does not scratch the skin like other thin metal buckles. It fits most people's arm, elbow circumference up to 33 cm[Application]: Through Tik-Tok sound, golfers can discover their mistake in bending the left arm to keep the left arm in a straight position. Therecompatible withe, an effective and desired hit can gradually be compatible withmed. Suitable compatible with all golfers or golf lessons, especially beginnersModel Number: Golf Training AidsType: Swing TrainerUse: Correct the swing posturegolf training aids: Golftitleist golf: Swing exerciserswing exerciser golf: golf swing trainersize:17x11.5CMMaterial:Nylon + webbing + Bucklecolour:BlackPackage Contents:5 x Golf Swing Elbow CorrectorOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.