Transponder keys, or “smart keys,” are factory-made and work via radio transmission between the key and the car from a microchip that resides in the key. The person who carries the transponder key can start and drive the automobile. These keys can help keep your car safe from car thieves. Transponders are usually found in high-end makes and models. However, other cars can come equipped with transponder keys. At Liberty Locksmith Services, we make and program transponder keys at your location. A transponder blank takes more than 30 minutes to “key” itself to a car.