Multi-purpose - The only 9-foot net that works for 36-foot tennis court height and regulation Badminton height. Adjusts to 33 inches or 60 inches in the middle, respectively, every time! * Telescoping poles - The vertical net poles raise and lower with a patented telescopic connector. * Built-in Airzone - The only 9-foot net with a built-in training system. The bright yellow top band creates an Airzone up to 68 inches to help develop spin and arc * Built-in second net - Connect top band to fence or regular net to create a second net. Save money on extra nets or Caution Tape * Built-in scoring system - The only net with a patented built-in scorekeeper for drilling and competition. Easy for young children to use! Package comes with 2 sets of score markers (a total of 8 pieces) in the event some pieces are lost