Tennis Tutor Plus Model 2

Features Ball capacity: 150 balls Trajectories: groundstroke to lob Ball ejection speed: 10-85 MPH Ball feed rate: 1-1/2 to 12 seconds Oscillator: built-in Playing time with heavy duty battery: 4 to 6 hours typical Anti-jam ball feeding mechanism 10-second start-up time delay Adds topspin and underspin capability