1. THREE DISTANCE MODES: The dog tennis ball launcher has three range modes: 3m/9.8ft, 6m/19.7ft, and 9m/29.5ft. One-button control adapts to different sizes of indoor and outdoor spaces. 2. LARGE 2200MAH BATTERY: The automatic dog ball launcher is equipped with a large 2200mAh battery, which can work for about 5-6 hours after being fully charged (depending on real-time usage). 3. INCLUDES 3 MINI TENNIS BALLS: The dog tennis ball launcher comes with 3 mini tennis balls (5 cm in diameter). Use other balls of a similar size. Try not to use balls that are too dirty or wet, as this will affect performance. 4. INTERACTIVE DOG TOY: The pet ball launcher's throwing game strengthens the bond between dogs and people, providing a fun new twist on the familiar game of fetch. 5. HIGH-QUALITY PLASTIC MATERIAL: The interactive automatic dog ball launcher is made of plastic for long-lasting use and can be played with indoors and outdoors.