The SMI Smartbox Braking Control Box is a vacuum-assisted braking system designed for trailers and RVs. Made by SMI in the United States, this control box is a reliable and high-quality component for ensuring safe and smooth braking performance. With a manufacturer part number of si0603, this product provides added safety and control for your towing needs. 

It is a bit heavy and will require some shipping. It may come to you via ups, usps, or fedex, depending on your address.