Features Fully Automatic, Progressive Supplemental Foot brake Completely From Sight - InvisiBrake May be so Small It Can Usually Be Mounted Under The Driver 39 s Seat, Under The back Seat, Behind Interior Panels Possibly in The Trunk Progressive Braking - As you Apply More Braking Force, So Does InvisiBrake - The Longer You Apply The Brakes In The Motorhome, The Harder Your Towed Vehicle Will Brake Two Stage Motorhome Monitor - InvisiBrake Includes An LED Monitor For the Visual Reference Of Braking Activity An Audible Alert At The Motorhome Will Warn You If The Brakes Have been...