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A smart key is a wireless car remote that works without the traditional mechanical blade. It can unlock the doors or open the trunk from the distance. It is also able to start the car without turning a key.

Most smart keys come with indicators for the battery that warn you of low battery levels in advance. It's easy to replace the battery without special tools.

Convenience

Smart keys are able to unlock doors and trunks, as well as turn off the engine of the car without the driver having to use a key made of metal. They also come with features designed to help deter break-ins and vehicle theft, like a panic button, which produces a sound to frighten away people who might be a threat to thieves or in isolated areas, such as underground parking garages.

Key fobs accomplish all of these functions by sending radio signals between the car key fob and the car using low-power wireless technology. This is a wonderful feature, especially for drivers who are on the move and don't have a lot of time.

A smart key is usually designed to look more like an plastic card than a key, and can be used to open the trunk or doors of a car when a button on the fob is pushed. Some even come with a built-in touchscreen to allow drivers to control certain settings of their vehicle, including climate and audio.

The RFID signal sent between a key fob and car is unique, encoded and linked 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 send a different frequency signal every time they're used, so that the computer doesn't recognize the old one as the real signal.

Security

Many people are hesitant to adopt digital keys as they are worried about security. While having a physical key fob to hand does feel more secure, it's important to know that digital keys are more secure than you might think. They're encrypted and the signal they send to a vehicle can be verified by a specific computer onboard. The vehicle won't start if the smart fob is compromised.

Contrary to traditional key fobs smart keys work by using built-in antennas in your car and an electronic radio-frequency generator inside the key fob. This allows it to communicate with your vehicle and perform standard functions like unlocking or opening it. This system allows you access to your vehicle without an actual key that you insert into the lock or ignition.

If you lose your smart key copy key or if the battery fails the majority of systems provide an alternative way to open and start your car. Emergency starting can be accomplished by placing the key into a slot or holding it in a certain space in the cockpit where an inductive coil is able to transfer energy.

Many smart key locksmith near me keys also come with a low battery indicator, which alerts you before the key is dead. You can replace the battery on your own when you need to.

Auto-adjusting settings

Instead of using the physical keys for your car Smart keys use radio waves to unlock and lock the vehicle. They also have the ability to remotely start your engine and track the location of the vehicle should you forget where it's parked.

Certain smart forfour key replacement keys have settings which automatically adjust the vehicle's exterior and interior based on the key that is detected. The car will automatically adjust the position of the seat and mirror settings, as well as climate control depending on the key being used. This is useful if you need to limit certain features or have multiple drivers.

Another benefit of smart keys is the fact that they utilize encryption to stop theft, which isn't feasible with traditional keys. This technology makes it very difficult for criminals with a technological edge to take over a vehicle by using a valid frequency according to How Stuff Works Electronics. Smart keys send a unique, encrypted signal every when the vehicle is unlocked or remotely opened.

The battery of a smart key will eventually wear out like any other battery-operated device. Most systems come with backup systems to unlock the car and start it if the battery is not able to function. The emergency method may differ however, it is usually holding the key in range of the sensor for the lock on the car or pressing a button that triggers the emergency starter.

Battery Backup

Modern smart keys, which are often referred to as keyless entry systems or passive entry use a transmitter and receiver to unlock your vehicle. The transmitter is inside the key fob that you carry around, and the receivers are found inside and outside your vehicle. When you drive by the vehicle, the radio frequency signal from your smart key is interpreted by the receivers, and it activates the doors and ignition.

This system offers many advantages, such as not having to search in the dark to find keys, but it is susceptible to certain types attacks. How Stuff Works Electronics reports that if a key's battery dies or is lost the person who has it could detect its low frequency transmission signal and then open your vehicle. This is why most smart keys are equipped with encrypted signals that make hacking a challenge.

However, these systems can also be interfered with through electromagnetic fields created by cell phones, computers and other devices. Therefore, if you find that your smart key fob is not functioning properly, it could be due to interference issues. In this scenario, you shouldn't put your key near such devices until the battery of the fob has been replaced. Fortunately, many smart keys will notify you well in advance when their batteries are depleted and the procedure for replacing them is relatively simple.