1. Flyball is only suitable for people over 6 years old. 2. After unpacking, please charge it for 25 minutes before using it (children are not allowed to charge the flying ball). 3. When using, please make sure that the 'up' sign is not downward, in case an accelerated fall would damage the flying ball. 4. Make sure to keep hair away from the product when using it to avoid getting caught by the propeller. 5. Do not use it outdoors in strong winds to prevent it from flying away. 6. The flying ball has a built-in battery which cannot be replaced, never get it wet.