A key fob with remote locking/unlocking and push-button start. A key fob with push-button start and keyless entry that owners can leave in their purse or pocket for virtually all functions.

If you have a key fob and have ever been curious about the circle arrow button and its function, here's what it means.

Thanks to ididit and their id.PUSH+ Push Button Start Kit classic car owners can add the luxury of keyless entry and remote start in their classic rides.

Push-button ignitions work via the fob, also known as a "smart key," which allows a driver to keep the device in a pocket, purse or other place when unlocking, locking and starting the vehicle.

If you're in a pinch and need a new copy of your car key, Ace Hardware may be the better alternative over the dealership, but it depends on what car you own.

Some key fobs have many features built in that owners may not even be aware of. Here's our guide to hidden key fob features.

If you've ever wondered what the circle arrow button on your key fob is for but were too embarrassed to ask your mechanic or dealership, here's the simple truth: it remotely starts your car.