Healthy Exercise This automatic ball launcher for dogs can help your dog exercise and improve his / her agility. Helps keep your dog active and healthy, reducing anxiety, depression and destructive behavior in dogs.Bring more surprises and fun to your dog. 3 Distance Modes Three distance modes: 10ft-20ft-30ft. Adjust the pattern appropriately according to your dog's energy level and play area. Built-in 2200 mAh rechargeable lithium battery, which can last for 5-6 hours on a full charge.+- 12 Pcs Mini Tennis Balls Our dog fetch machines are designed for small and medium-sized dogs, and each set includes 12 soft and secure 2-inch tennis balls and a tennis bag for storage. Let your furry friend enjoy an enjoyable playtime.