Package Contents: You will receive a golf smart ball, an air pump and an adjustable buckle lanyard. Product Material: This golf swing aid ball is made of fine and smooth PVC flocking fabric, which is soft and comfortable to the touch, with good air tightness and not easy to leak. The lanyard is nylon webbing, strong and durable, not easy to break. Quick Inflation: Our golf swing assistants are equipped with a small air pump, which can provide continuous air supply at any time. Simply open the air pump port to inflate the ball. Easy to Use: First hang the ball around your neck, adjust the length of the neck rope to the most suitable position for you, and finally clamp the ball between your forearms to maintain the posture. Ideal Swing Training Aid: This golf swing aid is perfect for beginners to practice, and also suitable for professionals to teach and improve swing performance, and it can also be used as a gift for golf players.