Using this O scale model train set is easy. First, make sure the power source is compatible with the digital DCC/analog DC control. Set the address to 3 if you want to use the DCC sound function. Since the A and B units are wired to operate in tandem, don't try to run just one unit. When starting the train, slowly increase the power to let it get moving smoothly. For maintenance, keep the wheels clean to ensure smooth running. You can use a soft, dry cloth to wipe the plastic shells and the chassis. Store the set in its original box and Styrofoam liner to protect it from damage. If you're shipping the set internationally, remember you'll be responsible for import duties and tariffs. Also, always handle the model with care as it's a fragile item. If you're not satisfied with your purchase, contact us within 30 days for a no - questions - asked money - back, but you'll need to pay for return shipping unless the item arrived damaged.