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Smart Keys For Cars Smart keys are wireless remotes that allow you to unlock doors and open the trunk without the necessity of a traditional mechanical blade. It also allows you to start your car without having to turn the key. Most smart keys come with battery indicators that notify you of an empty battery ahead of time. It's simple to replace the battery without special tools. Convenience Smart keys can unlock doors or trunks, and also turn on the engine of the vehicle without the driver having to use a metal key. They also come with features that are designed to deter burglaries and vehicle theft, like the panic button, which generates noise to scare away people who might be a threat to thieves or in areas with no security, such as underground parking garages. Key fobs accomplish all of these functions by sending a radio signal between the car and the key fob by using the low-power wireless technology. This is an excellent feature, especially for drivers on the move who don't have a lot of time. Smart keys are usually more like plastic cards than actual keys. They can be used to open the trunk or doors when they are pressed by the fob. Certain smart keys include a touchscreen that lets motorists to control their vehicle's settings, such as climate and audio. The RFID signal that is sent between a car key fob is unique, encoded and connected to the vehicle's onboard computer. This makes it impossible for hackers with the right skills to connect a stolen car equipped with a key fob. They can also be programmed to send a different frequency signal every time they're used, so that the onboard computer doesn't recognize the old one as the real signal. Security A lot of people are hesitant to adopt digital keys because they are worried about security. While having a physical key fob in your pocket may feel more secure however, digital keys are more secure than many believe. They're encrypted and the signal they transmit to a car is checked by a special onboard computer. This means that even if your smart key fob is stolen the car won't start. Smart keys, unlike traditional key fobs work by using the built-in antennas of your car to communicate with it and perform tasks like unlocking or starting your vehicle. This technology lets you access your vehicle without having to insert a physical key into the lock or ignition which can be an inconvenience. If you lose your smart key, or if its battery dies there is an alternative way to open and start your car. smart keys for cars 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. The majority of smart keys also have a low-battery indicator, which will alert you when the key is completely dead. If necessary, you are able to easily replace the batteries on your own. Auto-adjusting settings Instead of using a physical car key Smart keys use radio waves to unlock and lock the vehicle. The smart key also allows you to remotely start the engine and track the location of your vehicle in case you don't remember where you parked it. Certain smart keys come with settings that automatically adjust the car's interior and exterior according to the key that is detected. The car will automatically adjust the position of seats, mirror settings and climate control depending on the key that is being used. This is beneficial if you are looking to restrict certain features or have multiple drivers. Smart keys also have the advantage of encryption to stop theft. This is not a possibility with traditional keys. This makes it difficult for thieves with the latest technology to steal a car by imitating a valid frequency as reported by How Stuff Works Electronics. Smart keys send a unique, encrypted signal every time the vehicle is left unlocked or remotely opened. Like any other battery-powered device the battery in a smart key will eventually be depleted of power. The majority of systems have an emergency system that allows you to open the car and begin it if the battery fails. The emergency method varies and usually involves holding the key within range of the car's lock sensor or pressing an appropriate button on the key that activates the emergency starter. Battery backup Modern smart keys are called keyless entry systems as well as passive entry. They use an electronic transmitter to unlock your vehicle. The transmitter is located inside the key fob that you carry around and the receivers are located in your vehicle and outside. The receivers detect the radio frequency signals sent by your smart key when you get close to the vehicle and activate the ignition and doors. This system offers many advantages, like not having to hunt in the dark to find keys, however it is susceptible to attacks of certain types. For example, if the key's battery fails or is lost, someone else could pick up the low-frequency transmission signals from your key and then open your car, reports How Stuff Works Electronics. The majority of smart keys are encrypted signals, making hacking more difficult. If you notice that your smart key fob does not work properly, this could be due to an issue with interference. In this situation you shouldn't place your keys near devices like these until the battery in the fob has been replaced. The majority of smart keys will notify you when their batteries are low and the replacement process is fairly simple.