SMI Stay-IN-Play Duo Towed Vehicle Braking System
Item No. 77119
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SMI Stay-IN-Play Duo Towed Vehicle Braking System
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SMI Stay-IN-Play Duo Towed Vehicle Braking System

SMI Stay-IN-Play Duo Towed Vehicle Braking System is rated 5.0 out of 5 by 2.
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Item No. 77119
$1,049.99 $1,099.00
Save $49.01
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Nothing to take in or out of the towed vehicle.

Duo senses coach deceleration and uses the signals from the motorhome’s brake lights to activate towed car braking. No unwanted or unnecessary brake activations on grades or over bumps. And it’s all automatic. A patent-pending, palm-sized air cylinder applies proportionate and progressive braking effort to your towed vehicle’s power-assisted brakes.

Simple direct-pull activation – no pulleys

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  • Just turn it on and tow—no set-up required
  • Air pressure activates towed vehicle brake while vacuum energizes the power brake system
  • Hidden installation under the hood of the towed car
  • Completely universal and transferrable
  • Panic Stop Braking -- up to three times the normal effort
  • Unit Weight 12.23 lb
    Brand Demco
    MFG Part No. 9599006
    SMI Stay-IN-Play Duo Towed Vehicle Braking System is rated 5.0 out of 5 by 2.
    Rated 5 out of 5 by from Nothing to do I had this braking system installed and it works great. There are no brackets or plugs to connect once the dingy is connected to the motor home. The LED's indicating the brake system is working, I had installed behind the mirror. I can see them in the camera. Camping World did a nice job installing this system
    Date published: 2016-07-12
    Rated 5 out of 5 by from Wonderful I've had this for 5 years, over 80,000 miles. It works great and I have never had any problems. It is easy install for good DIY'er. It is air activated for near instantaneous brake application in the toad.
It is simple to use, just flip the switch to "on" and go.
    Date published: 2017-03-16
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    Can this be used with motorhomes that have manual brakes, not air brakes.

    Asked by: Lhen
    The Stay-In-Play Duo activates from the brake lights of the coach and inertia. So you only use tow wiring directly from the coach, no air lines are run between the motor coach and towed vehicle. The operating unit taps in to the vacuum line of the towed vehicle's brake booster to operate the air cylinder that will be attached to the towed vehicles brake pedal.
    Answered by: CW Steven
    Date published: 2019-03-21

    Will it drain the towed vehicles battery?

    Asked by: Randy
    The DUO only draws power when it activates. This means that you can tow for several days without concern for your battery.
    Answered by: cw_staff
    Date published: 2019-03-08

    Can this be used on diesel coach?

    Asked by: Buck
    Yes, the Stay-IN-Play system is compatible with gas and diesel coaches.<p>The installation manuals and videos can be accessed <a href=https://smibrake.com/installations.php>here</a>.
    Answered by: cw_staff
    Date published: 2019-03-08

    Is this the same as SMI Stay in play, SM99251

    Asked by: Bcbsmat

    Can this be used in a Nissan versa s

    Asked by: Rocky
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