Using this CAT 336 RC Hydraulic Excavator is easy. First, make sure the 700mAh lithium - battery in the excavator is fully charged and insert 2 x AAA batteries into the controller. Turn on both the excavator and the controller. You can then use the controller to operate the front and rear arms, buckets, and the rotational body. Use the auto demo functions to see a pre - set show. The light and sound functions add more fun. When not in use, store it in a dry place. Don't expose it to extreme temperatures. For the battery, charge it regularly but don't over - charge. If you notice any problems, stop using it immediately and check for loose parts or battery issues.