This is a factory Ford accessory. If you have a fob that unlocks your doors on your Mustang/Cobra, this should work for you. I used it on my 04 vert and mounted it under the trunk lip where the license plate goes. Can't be seen, yet worked perfectly. Will open the trunk too. Comes with the manual and the factory code. (which can be changed to your own code) $40 plus $5 shipping anywhere in the lower 48.