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How far does Bluetooth reach? And if through walls?

How far does Bluetooth reach? And if through walls?

2023-08-14 2008 1

The maximum range of Bluetooth depends on the following factors:

The Bluetooth class of the devices involved.
The environment in which the devices are used.
The presence of obstacles, such as walls, metal objects, or other electronic devices.

In general, Bluetooth Class 2 devices have a range of about 10 meters (33 feet) in open space. This range can be reduced to about 5 meters (16 feet) in an indoor environment with walls. Bluetooth Class 1 devices have a range of up to 100 meters (330 feet) in open space, and up to 30 meters (98 feet) in an indoor environment.

Smartphones (including iPhone), Bluetooth earphones, and smartwatches (like Apple Watch and Galaxy Watch) have a range of about 10 meters, however some smartwatches such as Galaxy Watch 4 Classic and Apple Watch Series 7 have a claimed range of up to 100 meters (330 feet).

The presence of walls and other obstacles can significantly reduce the range of Bluetooth. This is because Bluetooth signals are attenuated by materials such as concrete and metal. The more walls and obstacles between the two devices, the weaker the signal will be.

In addition to the factors mentioned above, the range of Bluetooth can also be affected by the following:

The power output of the Bluetooth devices.
The frequency of the Bluetooth signal.
The noise level in the environment.

The power output of Bluetooth devices is typically limited by regulations. This means that even if you have two high-powered Bluetooth devices, they may not be able to communicate over long distances if there are obstacles in the way.

The frequency of the Bluetooth signal can also affect its range. Bluetooth uses the 2.4 GHz band, which is a crowded band with a lot of interference from other devices. This can reduce the range of Bluetooth signals.

The noise level in the environment can also affect the range of Bluetooth signals. If there is a lot of noise in the environment, such as from other electronic devices or from traffic, it can make it more difficult for Bluetooth signals to travel.

Overall, the range of Bluetooth is typically about 10 meters in open space and 5 meters in an indoor environment. However, the range can be reduced by the presence of walls and other obstacles, as well as by the power output of the devices, the frequency of the signal, and the noise level in the environment.

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