Using your HO Scale Brass C&NW Chicago and Northwestern EMD F7A model is easy. Just connect it to an analog DC power source, and it will start running. When handling the model, be gentle as it's a delicate item. For maintenance, regularly check the wheels for any dirt or debris and clean them with a soft brush. If you notice any issues with the motor noise or operation, stop using it and check for loose parts. Store the model in its original box and foam when not in use to protect it from damage. Keep in mind that international buyers are responsible for any import duties and tariffs. And if you're not satisfied with your purchase, contact us within 30 days for a refund, though you'll be responsible for return shipping unless the item arrives damaged.