Features of Bluetooth communication best active noise cancelling headphones

Bluetooth communication has the following characteristics.
(1) Applicable worldwide. Bluetooth works in the 24GHz ISM frequency band. The range of the ISM frequency band in most countries in the world is 24~24835GHz. The frequency band can be used directly without applying for a license from the radio resource management department of each country.
(2) The communication distance is 10cm~10m, and it can reach 100m when the transmit power is 100mW. 
(3) It can transmit voice and data at the same time. Bluetooth uses circuit switching and packet switching technology to support asynchronous data channels, three-way voice channels, and channels for simultaneous transmission of asynchronous data and synchronous voice. www.bjbjaudio.com

(4) A temporary peer-to-peer connection can be established. According to the role of Bluetooth devices in the network, they can be divided into master devices and slave devices. The master device is a Bluetooth device that actively initiates a connection request through a network connection. When several Bluetooth devices are connected into a piconet, there is only one master device, and the rest are slave devices. The piconet is the most basic form of Bluetooth network. The simplest piconet is A point-to-point communication connection consisting of a master device and a slave device.
(5) Strong anti-interference ability. There are many kinds of radio devices working in the ISM band. In order to resist interference from these devices, Bluetooth uses frequency hopping to spread the spectrum. After a Bluetooth device sends data at a certain frequency, it jumps to another frequency to send, and the order of the frequencies is pseudo-random, and the frequency changes 1600 times per second, and each frequency lasts 625 μs. 
(6) The Bluetooth module is small in size and easy to integrate.
(7) Low power consumption. In the state of communication connection, the Bluetooth device has four working modes: active mode, breathing mode, hold mode and sleep mode. The active mode is the normal working state, and the other three modes are low-power modes specified for energy saving.
(8) The interface standard is open. In order to promote the application of bluetooth technology, the bluetooth technology alliance (SIG) has disclosed all bluetooth technical standards, and any unit or individual in the world can develop bluetooth products, as long as the bluetooth product compatibility test of SIG is finally passed, can be brought to market.
(9) Low cost. With the expansion of market demand, various suppliers have launched their own Bluetooth chips and modules, and the price of Bluetooth products has dropped. www.bjbjaudio.com

Application of Bluetooth Communication
The applications of bluetooth communication in the car mainly include car bluetooth phone, car bluetooth audio, car bluetooth navigation, bluetooth rearview mirror, car virtual key and so on. www.bjbjaudio.com