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2. Audio headset - Wikipedia

   en.wikipedia.org/wiki/Audio_headset

   Mobile phone or smartphone headsets may include a volume control, microphone and 3.5mm plug. Mobile (cellular) phone headsets are often referred to as handsfree. Older mobile phones used a single earphone with a microphone module connected in the cable. For music-playing mobile phones, manufacturers may bundle stereo earphones with a microphone.

3. Restrictions on cell phone use while driving in the United ...

   en.wikipedia.org/wiki/Restrictions_on_cell_phone...

   The laws regulating driving (or "distracted driving") may be subject to primary enforcement or secondary enforcement by state, county or local authorities. [1]All state-level cell phone use laws in the United States are of the "primary enforcement" type — meaning an officer may cite a driver for using a hand-held cell phone without any other traffic offense having taken place — except in ...

4. Kamala’s ‘audio earrings’ and all the other bogus debate ...

   www.aol.com/kamala-audio-earrings-other-bogus...

   The earpiece claim. During the debate on Tuesday night, conspiracy theorists spread the baseless claim that Harris’s earrings were transmitting audio. “The VP cheated with earring headphones?

5. Headphones - Wikipedia

   en.wikipedia.org/wiki/Headphones

   Headsets are also available with 2.5 mm jack sockets for many DECT phones and other applications. Cordless bluetooth headsets are available, and often used with mobile telephones. Headsets are widely used for telephone-intensive jobs, in particular by call centre workers. They are also used by anyone wishing to hold telephone conversations with ...

6. Handsfree - Wikipedia

   en.wikipedia.org/wiki/Handsfree

   Handsfree mobile phones are obligatory in many countries for use of a mobile phone while driving. However, studies have shown that even with a hands-free unit, the added distraction to the driver, and the increase in crash rates, are almost as substantial as when driving and talking on a normal mobile phone.

7. Bluetooth - Wikipedia

   en.wikipedia.org/wiki/Bluetooth

   The first Bluetooth mobile phone was the unreleased prototype Ericsson T36, though it was the revised Ericsson model T39 that actually made it to store shelves in June 2001. However Ericsson released the R520m in Quarter 1 of 2001, [ 23 ] making the R520m the first ever commercially available Bluetooth phone.