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Bluetooth speaker 4.0

Bluetooth speaker refers to the built-in Bluetooth chip, Bluetooth connection to replace the traditional wire-connected audio equipment, and mobile phones and tablet PCs and notebooks and other Bluetooth playback devices connected to achieve the purpose of convenient. At present, the Bluetooth speakers to portable speakers based, shape is generally more compact and portable Bluetooth speaker technology is also by virtue of its convenient characteristics of the gradual attention and acceptance by consumers, the market for more common single-channel Bluetooth speaker (single speaker unit ), But also the emergence of a number of excellent sound quality multi-channel speaker (two or more speaker unit).

Bluetooth 4.0 is the latest Bluetooth version 2012, is an upgraded version of the 3.0; compared to 3.0 version more power saving, low cost, 3 ms low delays, long effective connection distance, AES-128 encryption etc.; usually used in the Bluetooth headset, Bluetooth speaker and other equipment.
It supports two modes of deployment: dual mode and single mode. Dual mode, low-power Bluetooth function integrated in the existing classic Bluetooth controller, or low power stack is added on the existing classic Bluetooth Technology (2.1+EDR/3.0+HS) chip, the overall architecture is essentially the same, so cost increase limited.
Single mode for highly integrated and compact equipment, use a lightweight connection (link layer) layer provides ultra low power standby mode operation, simple equipment recovery and a reliable point to multipoint data transmission, but also allows networked sensors to arrange a good low power Bluetooth traffic order in the Bluetooth transmission, and advanced energy saving and safe encryption connection.