Bluetooth technology tws earbuds factory reset

Bluetooth is a low-cost, high-capacity, short-range wireless communication specification designed to replace cables between portable and fixed devices and to ensure a high degree of security. . Bluetooth technology is characterized by low power consumption, low price, and the use of the globally open 2.4GHZ frequency band. The power consumption of the Bluetooth hardware is very small. The power consumption of the Bluetooth hardware of Class 2 with a dry transmission distance of 10 meters is 0.25 mW to 2.5 mW; while the Bluetooth hardware of Class 1 with a transmission distance of 100 meters, the power consumption is at least 1 mm. Watts, up to 100 mW. Therefore, the electromagnetic wave radiation of Bluetooth will basically not cause harm to the human body. The price of Bluetooth hardware is generally relatively low, and the protocols and application specifications of Bluetooth technology are formulated and owned by IG, so there is no problem of copyright fees. Bluetooth works in the globally open 2.4GHZ frequency band, which is open globally and does not require payment. Bluetooth uses frequency modulation for communication. Bluetooth uses frequency hopping to spread energy into the ISM frequency band that starts at 2.402GHz and ends at 2.408GHz, and divides it into 79 frequency hopping channels, each of 1MHz, which greatly increases and Reliability and security of communications. www.bjbjaudio.com  <a style="opacity:0.0;color:#ffffff">tws earbuds factory reset</a>           <a style="opacity:0.0;color:#ffffff">tws earbuds factory reset</a>

The Bluetooth protocol has a simple structure, uses mechanisms such as retransmission to ensure the reliability of the link, and implements multiple security authentication mechanisms that can be graded in multiple layers. Devices that follow the Bluetooth protocol will be able to replace the intricate cables in traditional networks with microwaves to easily realize fast, flexible, secure, low-cost, low-power data and voice communications. www.bjbjaudio.com     <a style="opacity:0.0;color:#ffffff">tws earbuds factory reset</a>          <a style="opacity:0.0;color:#ffffff">tws earbuds factory reset</a>

In terms of security, in the link layer, the Bluetooth system provides functions such as authentication, encryption and key management. Each user has a personal identification code PIN), which will be translated into a 128-bit link key (LinkKey) for one-way and two-way authentication. Once the authentication is completed, the link will be encrypted with a password of different lengths (Encryption Key) (this password is increased or decreased in units of 8 bits, with a maximum of 128 bits). The link layer security mechanism provides a large number of authentication schemes and a flexible encryption scheme (ie Allow negotiating cipher length). This mechanism is extremely important when devices from different countries communicate with each other, as some countries specify a maximum password length. The Bluetooth system will select the minimum and maximum allowable password length for each device in the iconet network. The Bluetooth system also supports special security mechanisms within the different applications of the high-level protocol stack. For example, when two computers are exchanging business card information, one computer can only access the service of the other computer, but has no right to access other services. The Bluetooth security mechanism relies on PIN codes to establish a trust relationship between devices. Once this relationship is established, these PIN codes can be stored in the device for easier future connections. www.bjbjaudio.com     <a style="opacity:0.0;color:#ffffff">tws earbuds factory reset</a>       <a style="opacity:0.0;color:#ffffff">tws earbuds factory reset</a>

  <a style="opacity:0.0;color:#ffffff">tws earbuds factory reset</a>