Features:

• Hidden installation under the hood of the tow car.

• operating unit that goes in the engine compartment is only 8" long 6" wide and 2 1/2" deep.Patent-pending air cylinder applies your towed vehicle's power-assisted brakes AND automatically applies proportionate and progressive brake effort. Only 10 pounds of force on your brake pedal in normal braking.

• "Panic Stop Braking" - only SMI brings you additional stopping effort in a panic... up to three times the normal effort.

• Coach notification of brakes applied with every unit.

• The Stay-IN-Play DUO creates vacuum to provide totally reliable and consistent brake application.

• Two signals are required to activate the Stay-IN-Play DUO system. The coach brake must be applied, AND there must be sufficient G-force. No unwanted or unnecessary brake activations on grades or over bumps.  And best of all, it is all automatic.

• "Zero" set up for towing - the Stay-IN-Play DUO is always ready to tow.

• Simple installation mounts the small operating unit under the hood of the towed vehicle so you never know it is even installed.

-The air cylinder is so small it fits in the palm of your hand.  No other system offers this much control and this much power all combined with a simple install.

-On/off operation means you are tow ready in less time.

Installation Instructions