Sometimes it's tough to unlock the car in freezing weather. (autolist.com)
You should teach your child how to unlock car doors using the key or the buttons in your car and even a 2 year old is able to do this. (childproofingtips.com)
They can also be equipped with a head - up display, roof rails and an «Activity Key» waterproof bracelet that allows you to unlock the car with the key still inside. (autoweek.com)