Consider the following statements about blue tooth and mark the incorrect one........

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Consider the following statements about blue tooth and mark the incorrect one

Blue tooth works in radio frequencies

It uses low wattage

It can connect to multiple devices

It requires devices to be in Line of Sight for efficient operation

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Explanation:

4th option is incorrect.
Because the devices use a radio (broadcast) communications system, they do not have to be in visual line of sight of each other.
Bluetooth is a wireless technology standard for exchanging data over short distances (using short-wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz[4]) from fixed and mobile devices, and building personal area networks (PANs). Invented by telecom vendor Ericsson in 1994.