Emergency Locksmith

+1 (206) 735-3140

Operating Hours

7am to 10pm - All Days


903 9th Ave #37 ,Seattle, WA 98104

What are Key Fobs and How do they Work?

In the ever-evolving world of technology, even something as basic as a key has undergone tremendous transformation. Gone are the days of jingling keychains filled with a myriad of metal keys. Enter the age of the key fob, a small yet powerful device that has revolutionized access to our vehicles and, in some cases, even our homes and offices. But what exactly is a key fob, and how does it operate? Allow our experienced locksmith to elaborate.

Understanding Key Fobs

A key fob, in the automotive context, refers to a compact remote control that is used to lock, unlock, and sometimes even start vehicles. These devices communicate with cars via radio waves, allowing for keyless entry and operation.

But the term “fob” isn’t exclusive to cars. It also encompasses small electronic devices that grant access to buildings, apartments, or office spaces.

How Key Fobs Work

Radio Frequency Identification (RFID): At the heart of the key fob technology lies RFID. Both the fob and the vehicle (or door) have an RFID chip. When the fob button is pressed, it sends a specific code via radio waves to the car. If the code matches what the car expects, the desired action (like unlocking) is performed.

Rolling Codes: Modern key fobs use a technology called “rolling codes” or “hopping codes” to enhance security. Instead of transmitting the same code every time, the fob and the car synchronize to change codes. This ensures that even if someone intercepts the code, it can’t be used again, preventing unauthorized access.

Frequency Modulation: Key fobs operate over a specific frequency, typically ranging from 315MHz to 434MHz, depending on the region and the manufacturer. This frequency modulation ensures that the fob communicates only with its paired device.

Powered By Battery: Key fobs are battery-powered and need electrical power to function. They usually contain a small coin-cell battery. When the battery weakens or dies, the fob will cease to work and will need a battery replacement. A key fob programming and replacement service provider can help with this.

Advantages of Key Fobs

Convenience: No need to fumble with traditional keys. A button press is often all it takes to access or start your vehicle.

Enhanced Security: With rolling codes and encryption, key fobs offer a higher security level compared to standard keys.

Additional Features: Beyond just locking and unlocking, many fobs come with added functionalities like opening the trunk, sounding the alarm, or even starting the car remotely.

Keeping Your Key Fob Secure

With all technology comes potential vulnerabilities. It’s essential to:

Keep it Safe: Treat your fob as you would a traditional key. Don’t leave it exposed or in easily accessible places.

Be Alert: There have been instances of “relay attacks” where thieves amplify the fob’s signal to unlock and start cars. Store your fob in a metal container or a signal-blocking pouch when not in use.

Regularly Maintain It: Regular maintenance is essential. Replace batteries when needed and consider getting a spare fob as a backup.

Key Fob Services in Seattle 

Key fobs, with their blend of technology and convenience, have reshaped the way we think about access and security. Understanding how they function not only satisfies our tech curiosity but also enables us to use them more efficiently and securely. As we transition further into an era dominated by convenience and technology integration, the humble key fob stands as a testament to how even the simplest tools can undergo a modern transformation. Contact Pi Security Solutions, a trusted Seattle locksmith for key fob services by calling 206-735-3140.

About Us

Owner/operator Nim Gil, a product of a rigorous apprenticeship, has over 13 years’ locksmithing experience and has the knowledge and technical expertise to work on difficult, unique, or antique locks as well as all modern safe, vault, and lock technologies. We have worked on numerous entry control projects in the given time frame.

We are fully licensed, bonded, and insured. We are members of the Safe and Vault Technicians Association (SAVTA) and the Associated Locksmiths of America (ALOA). We work by the standards of these two leading organizations and are well-versed in state safety codes and other requirements.

Hours of Operation

Monday to Sunday – 7 AM to 10 PM

Email: locksmith@pisecuritysolutions.com


903 9th Ave #37 Seattle, WA 98104 All rights reserved to PI Security Solutions locksmith, Seattle. We offer leading locksmith services for residential, commercial, and automotive.

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