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Smart Keys For Cars A smart key is a wireless car remote that functions without the traditional mechanical blade and can unlock the doors or pop the trunk from some distance. It is also able to start the car without turning a key. The majority of smart keys have indicators for the battery that notify you of the low battery well in advance. Replacing the battery is a quick and easy process that doesn't require any special tools. Convenience Smart keys are designed to unlock trunks and doors and turn on the car engine, and then turn off the ignition without needing to use a traditional key. They also have features that help deter vehicle burglaries and thefts. For instance, the panic key that makes noises to scare off potential thieves in remote areas such as underground garages. Key fobs fulfill all of these functions via a radio transmission between the car key fob and the car using low-power wireless technology. This is an excellent option for drivers who are always in motion and don't have time to spare. A smart key is typically shaped more like a plastic card than a key, and it can be used to open the trunk or car's doors when the fob's button is pressed. Some even have a built-in touchscreen to allow drivers to control certain settings of their vehicle, such as climate and audio. The RFID signal transmitted between the car and a key fob is unique, encoded and linked to the vehicle's computer. This makes it impossible for hackers with the right skills to connect a stolen vehicle equipped with a key fob. The fobs can also be programmed to send a different frequency signal each time they're used so that the onboard computer isn't able to recognize the old one as the authentic signal. Security Many people aren't keen to switch to digital keys for cars because they are worried about security. While having a traditional key fob in your pocket may feel more secure but digital keys are more secure than people believe. They're encrypted, and the signal that they transmit to a vehicle is analyzed by a special onboard computer. The vehicle won't be able to start when the smart key fob is compromised. Smart keys unlike traditional key fobs, function by using the built-in antennas in your vehicle to communicate with it and perform standard functions like unlocking and starting your vehicle. This system allows you access to your vehicle without the physical key to insert into the ignition or lock. If you have lost your smart key or if its battery goes out it is possible to find an alternative method to open and start your car. For smart car key replacement G28 Car Keys , emergency starting can be accomplished by putting the key into a slot or holding it near a specific area on the car's cockpit, where an inductive coil which can transfer energy is hidden. Most smart keys also come with a low battery indicator, which will alert you before the key is dead. You can replace the battery on your own if needed. Auto-adjusting settings Instead of physical keys it uses radio waves to unlock, lock, and activate the car. They're also able to remotely start your engine and keep track of the location of the vehicle in case you lose track of where it's located. Certain smart keys come with settings that automatically adjust the vehicle's interior and exterior depending on which key is detected. The car can adjust seat position or mirror settings as well as climate control based on the key being used. This is beneficial if you need to limit certain features or have multiple drivers. Another benefit of smart keys is the fact that they employ encryption to prevent theft, which isn't a possibility with traditional keys. This technology makes it difficult for thieves with the latest technology to take over a vehicle through replicating an acceptable frequency signal according to How Stuff Works Electronics. Smart keys send a unique encrypted message each time the vehicle's remote is unlocked. Like any other battery-powered device the battery in a smart key will eventually be depleted of power. The majority of systems are equipped with a backup plan to open the door and start the car in the event that the battery fails. The emergency method is different however it typically involves keeping the key within range of the sensor for the lock on the car or pressing a key button which activates the emergency starter. Battery Backup Modern smart keys are also known by the names keyless entry systems or passive entry. They make use of an external transmitter to unlock your vehicle. The transmitter is built into the key fob is carried with you and the receivers are situated in your vehicle as well as around the outside. When you approach the vehicle, the radio frequency signal from your smart key is detected by the receivers, and it activates the doors and ignition. This system comes with many advantages, including not having to look in the dark to find keys, but it is also vulnerable to certain types attacks. How Stuff Works Electronics reports that if the battery in your key goes out or is damaged an attacker could detect its low frequency transmission signal and open your vehicle. This is the reason why many smart keys come with encrypted signals that make hacking difficult. If you notice that your smart key fob does not work as expected, it could be due to a problem with interference. In this instance, you shouldn't put your key near such devices until the battery on the fob has been replaced. The majority of smart keys will notify you when their batteries are depleted, and the replacement process is fairly simple.