I needed something to remind me to unplug a satellite radio in my Mustang Boss 302 after driving it. The radio and all hides in the center console, so I don't see it when I park and turn the car off. I ran the battery down to dead once because of not turning it off. Now I have this great reminder attached to the car's ignition key so I see it when I am done driving, The key fob is absolutely perfect. I hooked my key on it and now am reminded each time I see it. Mine has custom writing on it near the bottom section. I highly recommend this product and this company.