Tennis Trainer Rebound Ball Solo Tennis Self-Practice Equipment Portable Practice Training Tool Tennis Rebounder Kit Including 2 String Balls Sport Exercise Suitable for Beginners

*Product size: 8.07x7.87x1.96 inch *Product weight: about 220g *Packing: a PE bag Features: *No limited by the venue, no need to pick up the ball frequently *Suitable for entertainment activities or daily training for tennis amateurs. What does the package include? 2 tennis ball + 2 black rubber band + 1 tennis training device how to use: 1. Fill the base with sufficient water or sand 2. Tie the tennis ball with string to the base (anti-wrap hook) 3. Hit the ball slightly upwards to prevent the tennis ball from being pulled back to the ground by the elastic rope