What technology does Bluetooth primarily use for communication?

Bluetooth primarily uses radio frequencies for communication. This technology operates in the 2.4 GHz ISM (Industrial, Scientific, and Medical) band, which allows devices to communicate wirelessly over short distances, typically up to around 100 meters depending on the Bluetooth class and environment. By utilizing radio waves, Bluetooth can establish connections between devices like headphones, keyboards, and smartphones with low power consumption, making it particularly effective for mobile and portable applications.

The use of radio frequencies allows for robust and reliable communication even in environments with obstacles, as signals can penetrate through walls and other obstructions more effectively than infrared. While infrared signals require line-of-sight and are less versatile, Bluetooth’s use of radio frequencies enables a broader range of applications and easier device pairing without the need for direct alignment. The other technologies mentioned, such as Wi-Fi signals, which operate on different frequencies and protocols, and LIDAR technology, which is primarily used for measuring distances via laser, do not fit the Bluetooth communication model.