Description:This badminton serve is suitable for beginners to practice. It has the functions of fixed-point serve, automatic falling ball and convenient installation. The service distance is 6-10 meters, the angle of the ball machine can be moved, and the power mode can be directly plugged into the adapter to use electricity. The voltage is 110V. Four 1.5V No. 1 batteries can be used outdoors. Built-in service, the service interval is about 4 seconds.Parameter:Serving frequency: 4-6s / ballColor: black and whiteBattery: 1.5V battery * 4 (not included)Ball loading capacity: 15 (not included)Material: PVCApplicable places: schools, individuals, clubs and other sports venuesThe package contains:1 * Auto serve