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Smart Keys For Cars A smart key is a wireless car remote that works without the traditional mechanical blade. It can open doors or open the trunk from a distance. smart forfour key replacement lets you start your car without having to turn the key. Most smart keys have battery indicators that warn you of an empty battery ahead of time. Replacing the battery is a simple and easy process that doesn't require any special tools. Convenience Smart keys are designed to open trunks and doors and turn on the car engine and turn on the ignition without having to use a traditional metal key. They also have features that help deter vehicle burglaries and thefts, such as the panic key which makes noises to deter potential thieves in isolated areas like garages underground. Key fobs fulfill all of these functions by sending radio signals between the car key fob and your car using low-power wireless technology. This is an excellent feature for drivers on the go who do not have much time. A smart key is usually designed to look more like an plastic card rather than a key, and it can be used to open the trunk or car's doors when a button on the fob is pressed. Some smart keys have a touchscreen that allows motorists to control their car's settings, including climate and sound. The RFID signal sent between the key fob and the car is unique, encoded and tied to the vehicle's onboard computer. This makes it impossible for criminals with a technological background to wire a stolen vehicle equipped with a key fob. They can also be programmed to send a different frequency signal each time they're used so that the computer can't recognize the previous one as the genuine signal. Security Many people are hesitant to adopt digital keys as they are concerned about security. While having a tangible key fob to hand does feel more secure, it's important to know that digital keys are also more secure than you think. They're encrypted and the signal that they transmit to a vehicle is analyzed by a specific computer onboard. This means that even if your smart key fob is stolen the car will not start. Smart keys, unlike traditional keys, operate by using the built-in antennas in your car to communicate with it and perform standard functions like unlocking and starting your vehicle. This system lets you gain access to your vehicle without having a physical key inserted into the ignition or lock. If you lose your smart keys, or if its battery dies it is possible to find an alternative way to open and start your vehicle. Emergency starting can be accomplished by inserting the key into the slot, or by holding it near a particular area of the cockpit, where an inductive coil could transfer energy. Additionally, most smart keys have a low battery indicator that warns you well before it completely dies. You can replace the battery yourself if needed. Auto-adjusting settings Instead of using the physical keys for your car smart keys make use of radio waves to unlock and lock the car. They also have the ability to remotely start your engine and keep track of the location of the vehicle should you're not sure where it's parked. Certain smart keys have settings that automatically adjust the car's interior and exterior according to which key is detected. For instance the car will recognize the key you're using and then automatically adjust the seat position, mirror settings, and the temperature control. This is helpful if are looking to restrict certain features or have multiple drivers. Another benefit of smart keys is that they use encryption to stop theft, which isn't a possibility with traditional keys. This technology makes it very difficult for criminals with a technological edge to steal a car by mimicking a valid frequency as reported by How Stuff Works Electronics. Smart keys transmit a unique, encrypted message every time the remote is unlocked. The battery of a smart key will eventually run out, just like any other battery-operated device. Most systems are built with a backup system to open the car and start it in the event that the battery fails. The emergency procedure can differ, but it usually involves holding the key in range of the sensor for the lock on the car or pressing a key button that activates the emergency start. Battery backup Modern smart keys are also identified by the terms keyless entry systems as well as passive entry. They make use of an electronic transmitter to unlock your vehicle. The transmitter is embedded in the key fob is carried with you and the receivers can be found within your car and around the outside. The receivers are able to detect the radio frequency signal transmitted by your smart key when you enter the vehicle, and they then open the ignition and doors. While this system offers many advantages, including the ability to not have to search for a key, it can be vulnerable to certain types of attacks. How Stuff Works Electronics reports that if a key's battery dies or is lost an attacker could detect its low frequency transmission signal and open your vehicle. The majority of smart keys come with encrypted signals, which makes hacking more difficult. However, these systems could be affected due to electromagnetic fields generated by computers, cell phones and other devices. If you notice that your smart key fob isn't functioning correctly, it could be due to an interference problem. In this situation you should not place your keys near devices like these until the battery on the fob has been replaced. Many smart keys will notify you when their batteries are not fully charged and the replacement process is relatively easy.