Description Product Description Material: Nylon Size: 17 x 11.5 cm Color: Black Quantity: 1 pc Package content: 1 pc x Golf Swing Trainer 1. Application: This golf training aid uses sound feedback to help golfers detect left arm curvature during the swing, encouraging a straight left arm position for improved swing consistency. Suitable for all golfers, including beginners and those taking lessons. 2. Sound Prompt for Incorrect Posture: The trainer features an integrated alarm mechanism that emits an ble signal when the elbow bends during the swing, indicating incorrect posture. Users should adjust to maintain a straight left arm. 3. Adjustable and Portable Design: Equipped with strong hook-and-loop fasteners and a durable plastic buckle for secure, comfortable, and easy adjustment. The buckle is designed to avoid skin irritation. Fits most arm sizes. 4. Secure Fit: Unlike basic belts, this trainer wraps fully around the elbow for enhanced stability, minimizing shifting during use and improving alert accuracy. 5. Breathable Construction: Made from high-quality, breathable nylon fabric, webbing, and hook-and-loop fasteners. Lightweight, durable, and comfortable for extended use.