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Bluetooth is a standard wire-replacement communications protocol primarily designed for low power consumption, with a short range based on low-cost transceiver microchips in each device. [30] Because the devices use a radio (broadcast) communications system, they do not have to be in visual line of sight of each other; however, a quasi optical ...
Initial sales were slow, because at the time electronics retailers provided low-cost lamp cords to consumers for free [1] [5] or at low prices and audiophiles didn't believe audio cables made a difference in the sound. [6] Monster is credited with creating the market for high-end audio cables in the 1980s [6] [8] through Lee's "marketing ...
Bluetooth 2.1 improved device pairing speed and security. Bluetooth 3.0 again improved transfer speed up to 24 Mbit/s. In 2010 Bluetooth 4.0 (Low Energy) was released with its main focus being reduced power consumption. Before Bluetooth 4.0 the majority of connections using Bluetooth were two way, both devices listen and talk to each other.
It was expensive: the contemporary Ford Model A cost $540. A Plymouth sedan, "wired for Philco Transitone radio without extra cost," was advertised in Ladies' Home Journal in 1931. In 1932 in Germany the Blaupunkt AS 5 medium wave and longwave radio was marketed for 465 Reichsmark, about one-third of the price of a small car.
Car thieves only sometimes target the entire vehicle. Often, they go after specific parts that are easy to remove and valuable to sell. But you don't have to be a victim.
The bit rate is 1 Mbit/s (with an option of 2 Mbit/s in Bluetooth 5), and the maximum transmit power is 10 mW (100 mW in Bluetooth 5). Further details are given in Volume 6 Part A (Physical Layer Specification) of the Bluetooth Core Specification V4.0. Bluetooth Low Energy uses frequency hopping to