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Smart keys are wireless remotes which allow you to open doors and pop the trunk without the need for a traditional mechanical blade. It can also be used to start the car without turning a key.

The majority of smart keys Cars phones include battery indicators, which warn you in advance of a low battery. It's easy to replace the battery without special tools.

Convenience

Smart keys are designed to open doors and trunks and trunks, turn on the car engine and activate the ignition without the driver needing to use a traditional key. They also come with features that are designed to prevent vehicle theft and break-ins, like the panic key which makes noises to deter potential thieves in remote areas such as garages that are underground.

These key fobs perform all of these functions by sending an audio signal between the car key fob and the car via low-power wireless technology. This is a great feature for drivers on the go who do not have much time.

Smart keys are typically more like plastic cards than actual keys. They can be used to open the trunk or doors when they are pressed by the fob. Some smart keys have touchscreens that allow drivers to control the vehicle's settings, such as the climate and audio.

The RFID signal transmitted between the key fob and the car is unique, encoded and tied to the car's onboard computer. This makes it almost impossible for criminals with a technological background to hotwire a stolen car equipped with the key fob. These fobs can also be programmed to transmit a new frequency signal each time they're used, meaning the computer in the car won't be able to recognize an old signal as the "true" signal.

Security

Many people are reluctant to adopt digital keys because they are worried about security. While having a physical key fob in hand can feel safer however, digital keys are more secure than most people believe. They're secure, 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 never start.

Contrary to traditional key fobs smart keys operate by utilizing built-in antennas inside your vehicle and a radio pulse generator within the key fob that allows it to communicate with your vehicle and perform basic functions such as unlocking and the start of it. This allows you to gain access to your vehicle without an actual key that you insert into the ignition or lock.

If you have lost your smart key or if its battery goes out there is an alternative method to open and start your vehicle. It is possible to start your car in emergency situations by placing the key into an opening, or keeping it close to an area of the cockpit, where an inductive coil will transfer energy.

Additionally, most smart key replacement keys have a low battery indicator that alerts you before it completely dies. You can easily replace the battery yourself should you need to.

Auto-adjusting settings

Instead of using a physical key it uses radio waves to unlock and lock the car. They also have the ability to remotely start your engine and keep track of the vehicle's location in case you lose track of where it's located.

Certain smart keys have settings that automatically adjust the vehicle's interior and exterior according to the key that is detected. The car will adjust the position of seats as well as the settings for mirrors and climate control depending on the type of key used. This is useful if you have multiple drivers or need to restrict certain features when you loan your car to a novice driver.

Smart keys also have the benefit of encryption, which can prevent theft. This is not possible with traditional keys. This technology makes it difficult for thieves who are tech-savvy to hijack a vehicle by mimicking an authentic frequency signal, according to How Stuff Works Electronics. Smart keys send a unique, encrypted message every time the remote is unlocked.

The battery of a smart key will eventually wear out just like any other battery-operated device. Most systems are designed with a backup method to open and start the car if the battery fails. The emergency method can vary however it typically involves keeping the key within the range of the sensor for the lock on the car or pressing a key button that activates the emergency starter.

Battery backup

Modern smart keys, which are also referred to as keyless access systems or passive entry make use of a receiver and transmitter to unlock your vehicle. The transmitter is incorporated into the key fob you carry around with you, and the receivers are placed in your vehicle as well as around the outside. When you approach the vehicle, the radio frequency signal from your smart key is recognized by the receivers and triggers the doors and ignition.

Although this system has many advantages, including the ability to not have to search in the dark to find keys, it may be vulnerable to certain types of attacks. How Stuff Works Electronics reports that if the battery in your key fails or is stolen, someone could pick up the low-frequency transmission signal and then open your vehicle. Most smart keys have encrypted signals, which makes hacking more difficult.

However, these systems could also be impacted through electromagnetic fields created by computers, cell phones and other devices. Therefore, if you find that your smart key fob is not working properly, it may be caused by interference. In this scenario it is advised not to place your keys near devices like these until the battery on the fob has been replaced. Fortunately, many smart car key recoding keys will inform you in advance when their batteries are drained and the process to replace them is fairly simple.