Bluetooth LE

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Bluetooth LE

(Bluetooth Low Energy) The low-power transmission technology introduced in Bluetooth 4. Using watch batteries, Bluetooth LE devices can operate for months or years before requiring replacement. Operating in the 2.4GHz frequency band, Bluetooth LE supports peer-to-peer and star topologies. See ANT.

Smart = Low Power; Smart Ready = All Bluetooth
Products with the Bluetooth "Smart" branding use only low-power Bluetooth LE transmission, whereas Bluetooth "Smart Ready" devices support both classic Bluetooth and Bluetooth LE.

Wibree -> ULP -> BLE
Originally the Wibree technology from Nokia, Wibree was renamed Bluetooth Ultra Low Power (ULP) in 2007 and Bluetooth LE (BLE) in 2009. See Bluetooth.
References in classic literature ?
his hum- ble subjects hunger and thirst for words of wisdom out of the mouth of their master his Serene and Sacred Raggedness
I could hear the owls and the wolves away off in the woods, and it seemed terri- ble still.
Though conscious of the difficulty of learning without a teacher, I set out with high hope, and a fixed purpose, at whatever cost of trou- ble, to learn how to read.
Joe replied, as she now replied, "Oh, Un - cle Pum - ble - chook
Artists may come who will portray the marvel of the wires that quiver with electrified words, and the romance of the switchboards that trem- ble with the secrets of a great city.
The telegram concluded with the words: "Formi- dable as they seem to be, the Martians have not moved from the pit into which they have fallen, and, indeed, seem incapa- ble of doing so.
The Martians had been repulsed; they were not invulnera- ble.
But he instantly saw that it would be impossi- ble for him to escape from the regiment.
Greek and Latin were as familiar to them as the bab- ble of their childhood.
There would be tables wrapped up in sacking; rolls of carpets thick and vertical like fragments of columns, the gleam of white mar- ble tops in the dimness of the drawn blinds.
I don't suppose the girl knew what to do with it, but he seemed to think that his honoura- ble intentions could not be mistaken.
Sprawl ing there in the chair, he would, now and again, draw the palms of both his hands down his face, giving at the same time a slight, almost impercepti ble, shudder.