Twins allows you to leave your number directly in the car, even in the dark. In the event of an emergency, a parking attendant or any other person can dial you and alert you. And if you don't want to talk, you just need to cover the number with a movable cover.
Features
Twins comes with eight spare sets of numbers that can be added to make two numbers with any combination. Also, each digit on the parking card has a luminescent coating, so the number will be visible even in the dark.