We often get balls returned because of their size! Please note! The ball measures 5.6 cm which is small compared to a tennis ball (6.6 cm)! So if your dog can fit a tennis ball in its mouth then this ball is too small! Avoid unnecessary returns as this is inconvenient for both you and us and puts unnecessary strain on the environment! Battery life is approximately 4 hours and charging time is approximately 1.5 hours from completely empty to completely full. Interactive Ball for Small and Medium Dogs. Are you looking for a fun and interactive toy for your dog? Then this interactive dog ball is perfect for your four legged friend! With its spinning bouncing and moving parts this ball will stimulate the curiosity and exploratory spirit of small and medium sized dogs during playtime. Product benefits: • Interactive and multifunctional design • Choice between smart and normal modes • Made of durable material • Promotes physical and mental development • Suitable for small and medium sized dogs. This dog ball is ideal for dogs who love to play and be active. The smart and normal modes ensure the toy is suitable for different breeds. Additionally the ball will automatically turn off after a certain time to conserve energy. Made from high quality materials this dog ball is resistant to chewing and scratching giving it a long lifespan. Furthermore the ball not only provides physical exercise but also stimulates the mental development of dogs by solving puzzles and chasing the moving parts. Product Specifications: • Suitable for: Small and medium sized dogs • Material: High quality and durable • Modes: Smart and normal with automatic power off function • Application: Promotes the physical and mental development of dogs • Ideal for interactive play and exploration Normal Mode Press the power button for 3 seconds and a green light will illuminate. The interactive ball will activate and roll silently around the house. After 5 minutes of inactivity the ball will automatically stop. Smart Mode Press the power button for 3 seconds and a blue light will illuminate. Smart mode is now activated. The ball rolls rotates 360 degrees and emits a gentle vibration. The ball enters standby mode after 5 minutes. When your dog touches the ball again it will immediately reactivate and the fun can begin again.