Towing large trailers hinders your ability to stop quickly. Protect and control your trailer and vehicle investments with Hopkins™ trailer brake controls. Most state laws require the use of electric brakes on all trailers weighing over 3,000 Pound. Hopkins™ Time Based Brake Controls Offer Ultimate Reliability And Affordability. Make your brake control installation easy! No more running wires through the fire wall or searching for the stop switch. No more hassles. It’s Plug-In Simple!(R).