1. Globally applicable: Bluetooth operates in the 2.4 GHz ISM band, and the ISM band in most countries in the world ranges from 2.4 to 2.4835 GHz. It is not necessary to apply for a license to the radio resource management departments of various countries.
2. Simultaneous transmission of voice and data.
3. You can establish a temporary peer-to-peer connection.
4. Has a good anti-interference ability.
Bluetooth uses the Frequency Hopping method to spread the spectrum (Spread Spectrum), which divides the 2.402-2.48 GHz evaluation into 79 frequency points, and the adjacent frequency points are separated by 1 Hz. After the Bluetooth device sends data at a certain frequency point, it jumps to another frequency point to send, and the order of the frequency points is pseudo-random. The frequency changes every 1600 times, and each frequency lasts 625 μs.
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