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AOL Mail offers secure and personalized email with features like AOL Mail, news, and weather for free. You can also access your email on the go with an iOS & Android app and get help from experts.
Learn about the origin and evolution of headphones, from the first telephone receivers to the modern wireless earbuds. Discover the different types of headphones, such as circumaural, supra-aural, earbuds, and bone conduction, and how they connect to various audio sources.
The noise-cancelling Bluetooth headphones feature Cortana integration and four beam-forming microphones. [34] On August 15, 2020, Microsoft introduced Surface Headphones 2, compatible with Windows 10 and Windows 11 Home/Pro with the latest updates. It's also compatible with Bluetooth 4.1/4.2/5.0, IOS 12 or 13, Android 9 or 10.
Bluetooth is a short-range wireless technology standard for exchanging data and building personal area networks. It was developed by Ericsson in 1989 and launched as an open industry standard in 1998 by the Bluetooth SIG, with IBM, Intel, Nokia, and Toshiba as founding members.
Learn about audio headsets, a combination of headphone and microphone that connect to telephones, computers or mobile phones. Find out the different styles, designs, compatibility and functions of audio headsets for various applications.
Learn about the history and types of phone connectors, cylindrical-shaped electrical connectors for analog audio signals. TRRS is a 4-contact plug with tip, ring, ring, and sleeve, used for headset with microphone or video with stereo audio.
DEFCON is a system of five levels of readiness for the US Armed Forces, from normal (DEFCON 5) to nuclear war (DEFCON 1). Learn about the definition, history and examples of DEFCON levels, including DEFCON 3 during the Cuban Missile Crisis and the Yom Kippur War.