日々更新mobilerA8（Yahoo!ニュースを毎日ウォッチ）

BBCより。Blourtoothが使われだして１５年だそうだ。

iBUFFALO BUFFALO Bluetoothオーディオ送信機 ステレオミニプラグ接続 ブラック BSHSBT02BK 新品価格 ￥3,600から (2013/9/6 08:45時点)

LOGICOOL ワイヤレス レーザー式 2ボタン? M555b 新品価格 ￥2,806から (2013/9/6 08:46時点)

健康や農業分野などで活発に使われるようになっているのは、そのコストの安さと消費電力の低さなどから。
もともとコイン型のバッテリーで数ヶ月もったのが、今や数年持つという風に改良も行われているのも様々な分野で使われるようになった理由の一つだという。
http://www.bbc.com/future/story/20130905-the-rise-of-bluetooth
Why Bluetooth use is on the rise

Bluetooth has been with us for around 15 years. Named after Denmark’s King Harald "Bluetooth" Blatand, who reigned in the first century AD, it is a technology that everyone is aware of on their computers and phones, yet not many people choose to use. As a means of allowing devices to talk to each other cheaply and wirelessly over short distances, it has tended to stay largely in the shadows, leaving the limelight to the technologies it connects.

Now however, with the rapid growth in the use of mobile and sensing technologies, along with the release of an updated version of the system, means the list of its applications is growing steadily. From health and agriculture, to business and electioneering, it is quietly playing an ever more central role in many of our lives.

“It’s a very flexible, low power, and predictable technology,” says Professor Roch Guerin, Chair of Computer Science and Engineering at Washington University, St. Louis. “Bluetooth targets lower transmission ranges and data rates than wi-fi, and as a result has lower cost and lower power consumption.”

These costs have dropped further, in some cases significantly, thanks to recent advances. Bluetooth Smart, launched in 2011, includes a smarter power management system that allows it to turn on, transmit data and shut down more quickly – in just a few milliseconds in some cases. Depending on the devices being connected and the data being transmitted, this updated system consumes anywhere between half and 1/100th of the power of the previous version. As a result, machines using Bluetooth that previously ran for a few months on a coin cell battery, can now run for years.