Features:Sensory training bouncing ball: This luminous bouncy ball can exercise coordination, balance and improve children's concentration. It only takes 10 minutes a day to effectively improve your physical fitness.High-quality material: This sensory integration training bouncing ball is made of high-quality material, light and soft, round and not hurting hands, safe and reliable.Luminous bouncing ball: Fun bouncing ball toys can easily stimulate children's interest in sports, help encourage children to staying away from dependence on video, let children enjoy a healthier life style.EASY TO USE: Slide your foot through the rings and swing the rope ball around your ankle in a circular motion. Keep jumping over the ball and rope with your other foot, don't missing the jumping or step on the rope. It is one of the best exercise equipment for people of all ages.Widely Applicable: Perfect for bouncing games, birthday parties, game prizes, etc., can be used in the classroom or office, you can exercise at home without going out. Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurementDescription:Material: plastic, electronic componentsBall diameter: 10.5cmRings inner diameter: 11.5cmRope length: 52cmPower supply: 2 AA batteries (the upgrade model does not match the battery) / standard model: built-in button batteryAge of use: 3 years old and above