i run the older traxxas set up not the 2.4. I got a fail safe and you have to let us know if you have the 2.4 set up. If you have the old style set up just connect the fail safe between the throttle servo. For the most part all fail safes are the same you hold down the button on the fail safe i use a pen tip to get to those buttons. Then you set your brake to full or 90 percent for me i go to max then you let go of the button on the false safe. You turn off your remote and they fail safe should turn your throttle servo to full brake or to what ever you set it to. Most set ups that are 2.4 have built in fail safes, i just got back in to hobby being away for about 4 years and i am blown away how this is part of the 2.4 set up lol. Kinda saves us all 18-22.00 but for me i have a older setup and i got a hpi fail safe and it worked out well.