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No wires necessary: A simple explanation on how Bluetooth works

Bluetooth has been around for quite some time now. But do you know how it actually works? We’ll explain in detail below.


Bluetooth has been one of the most widely used connection technologies in recent years, especially since the rise of the smartphone. Bluetooth allows different devices to connect wirelessly, eliminating the need for messy wires that can get lost or broken.

And now, with the advent of connected cars like the Dodge Challenger, Bluetooth has become more desirable than ever. But have you ever wondered how the technology works? How can one device connect to another — or even several — device without the use of wires? It’s a fairly fascinating technology and many lay people may not know how it works. Here’s a quick history of Bluetooth technology and how it allows you connect all of your devices.

How it Works

As advance as Bluetooth technology may seem, it uses an older technology that has been around for nearly a century: radio waves. Much like a radio station or a CB set in a truck, Bluetooth utilizes the power of radio waves to transmit information between devices.

Bluetooth uses a much more weaker signal than a radio station would, though. It uses a short band of frequency from 2.4 to 2.485 GHz to transmit data over very short distances (most Bluetooth signals are far too weak after 200 feet, although some new devices can reach up to 800 feet). And, much like a radio tower and the radio in your home or car, the devices that are connected transmit information between them through the air.

Paired Devices

When two or more devices are connected through Bluetooth, they are said to be “paired.” This means that they are ready to receive and send information between them.

For security reasons, most Bluetooth devices have authentication codes that must be verified by each device before they pair. This is why you may need to enter a code or perform a short task in order for two devices to pair for the first time. Once they are paired, they form a “piconet:” a small network where one device acts as the master and the other devices as slaves. This network can change as paired devices move in and out of range.

Endless Possibilities

Because of the ease of Bluetooth technology and the high-quality streaming it allows between devices, there are many possible uses for it in the future.

While it’s already in our mobile devices, vehicles and even in some home appliances, there are many more possible applications. Engineers are working on creating Bluetooth devices that can act as tiny sensors and be run from unlimited power sources like kinetic and solar. These devices can then be placed in clothing, athletic equipment — including baseballs and footballs — and nearly anything you can think of where you would want to collect data. There’s even a possibility that you could connect a device to your teeth so you can transmit sound directly to your ear without the need of speakers!

Bluetooth is undoubtedly one of the most important and interesting technologies we use today.

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