To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
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The Stay-IN-Play Duo uses both an inertia sensor and the motorhome’s brake light signal to make sure braking feels precise and natural. The G-Force controller senses deceleration, confirming that your RV is actually braking before sending a signal to the operating unit. That unit then applies your car’s brakes with matching pressure, so both vehicles slow down together. You can fine-tune the sensitivity with a simple knob, giving you control over how quickly or firmly the system reacts. The result is smooth, synchronized stops without any jerky motion or delay.
Once installed, the Duo is ready every time you plug in your toad. It automatically powers on when connected to your RV and needs no further setup. The components mount permanently under the hood or dash, staying out of sight so nothing interferes with how you drive or use your vehicle day to day. There’s no bulky box to move in and out each trip—just flip the G-Force controller switch and go.
The included wireless Coachlink monitor keeps you aware of what’s happening in real time. Lights and beeps alert you whenever your towed vehicle’s brakes are applied, so you always know the system is working as it should. The transmitter connects directly to a reed switch on the brake pedal for an accurate reading of actual brake activity—not just when the system tries to engage.
In an emergency disconnect, the integrated breakaway switch immediately activates your car’s brakes using a reserve air supply from the operating unit. Instead of rolling away, your vehicle will come to a controlled stop, meeting safety requirements for supplemental braking systems.
Most braking systems lose vacuum pressure when the engine is off, which can make them press too hard on the pedal. The Duo prevents that by reactivating the vehicle’s vacuum-assist line so it brakes evenly and naturally, just like it does under normal driving conditions. This helps protect your brake components and ensures consistent performance trip after trip.
For motorhomes with hydraulic brakes; compatible with continuous-power-assist brakes; operating unit measures 8" long x 5" wide x 2-1/4" tall; includes a 5-year warranty.
Flat towing can be a much more convenient way to take your car RVing with you than using a trailer or a tow dolly. It'll save you storage space both at home and at the campsite, and it takes less time and hassle to hook up.
To flat tow your vehicle, there are 5 basic components you're going to need: a tow bar, a base plate kit, a safety cable set, tow bar wiring, and a flat tow braking system.
| For the RV | Between the RV and Towed Car | For the Towed Car |
|---|---|---|
| Hitch | Tow bar | Base plate |
| Wiring plug | Safety cables | Braking system |
| Wiring adapter cord | Wiring kit/diodes |
The custom-fit base plate installs on the frame of your toad so you can connect the car to your RV with a tow bar. Hook up safety cables between the vehicles to ensure that the toad does not separate from the motorhome if the tow bar becomes detached. Tow bar wiring syncs your vehicle's signal lights with your motorhome's tail lights, as required by law in most states. Finally, the flat tow braking system - also required in most states - activates the brakes in the toad when you hit the brakes in the RV, making for smoother, safer braking, and preventing wear on your motorhome.
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews
Bob
11/17/2025
After a year of towing our Jeep now for over 20K miles, the Demco Stay-N-Play still works great. It’s easy to setup to tow and uncouple. Just flip the switch to turn it on and everything works as expected. Just remember to turn it off when you want to drive otherwise the first time you touch the brake you get to experience a very rapid deceleration event!
Jeffrey
11/19/2022
I works perfect every trip. I do a hard braking test at the beginning of every trip. The wireless monitor in the motorhome immediately reports the functionality of the braking system. I am very satisfied with this product. I installed everything myself.
Do you have a question about this Flat Tow Brake System?
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Brooke M.
6/30/2025
Thanks for sending along the photos and the details of what you did for the install here. You seem pretty comfortable around your Jeep. Do you work on cars for a living?