This is the official key to our new car. We got two of them. It's the size and feel of a credit card. It's actually just a backup as everything is done through our phones. When we walk up to or away from the vehicle the bluetooth connects with our phones and knows it's us and either unlocks or locks the vehicle. We're supposed to keep it on us just in case there's an issue.
Love that entry system. We have a plug-in hybrid. We can’t quite get past the running our of fuel fear, so glad to have spare gas. Have only filled it a couple of times and only when on vacation.