Versatile Training Modes: Equipped with both online and offline functionalities, the ball connects to an app offering over 20 training modes. Offline, it operates in three distinct modes based on light and chatter cues, ensuring comprehensive training regardless of internet availability. Constructed from silicone, the ball withstands regular impacts without damage. Its six-corner design promotes unpredictable rebounds, further challenging your reflexes and enhancing training effectiveness. Portable and Rechargeable: The compact design (2.2*2.2 inches) includes a rechargeable lithium battery, charging in just 2 hours for up to 10 hours of use. Each set comes with a reaction ball, storage bag, charging cable, and user manual, making it easy to train anywhere. Ideal for Various Sports: This reaction training ball is perfect for athletes in basketball, soccer, fitness, boxing, hockey, baseball, volleyball, tennis, track and field, and badminton, helping improve performance through targeted reflex training. Power Source: Rechargeable lithium battery Charging Method: USB cable Modes: Online and Offline Color: White Material: Silicone Package Contents: 1* Reaction Training Ball 1* Storage Bag 1* Charging Cable Only the above package content, other products are not included. Note: Light reflection 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.