Friendly Reminder: 1. Make sure the ball launcher is fully charged before 1st use. 2. Drop only ONE ball into the hole on the top of launcher. The ball will be launched out in about 5 seconds. Then drop in another ball after the internal ball roller stops rolling. 3. The ball launcher CAN'T work when being charged. 4. Make sure no one standing in front of the machine when it is launching. The operation indicator will flash red light when the ball is dropped in and being launched,the operation indicator is green when not launching. 5. Do not place your hand inside the launch pocket. 6. Please keep a close watch on your dog when playing to make sure your dog is safe;remove the ball if pieces begin to break off. 7. Broken tennis balls,dirty surfaces,and wet balls will affect the launch distance *Specifications*: Product Type: Automatic Dog Ball Launcher Material: ABS Color: White+Green Input: 5V/2A Power Supply: 3Pcs 3.7V Built-in 2200mAh Rechargeable Batteries Charging Port: Type-C Port Charged Time: About 4H Working Time: About 5H Adjustable Launch Distance: 3M/9.84FT;6M/19.68FT;9M/29.52FT Automatic Infrared Induction: 110°; 2M/6.56FT Supportive Tennis Ball Diameter: 4.8-5cm/1.88-1.96in Type-C Charging Cable: 115cm/45.27in Item Size: 25x27x21cm/9.84x10.62x8.26in Item Weight: 1196g/2.63lbs Package Size: 29*28*24cm/11.41*11.02*9.44in Package Weight: 1800g/3.96lbs *Package Lists*: 1x Automatic Dog Ball Launcher 6x Balls 1x Type C Charging Cable 1x User Manual