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Many wireless mobile headsets use Bluetooth technology, supported by many phones and computers, sometimes by connecting a Bluetooth adapter to a USB port. Since version 1.1 Bluetooth devices can transmit voice calls and play several music and video formats, but audio will not be played in stereo unless the cell phone or media device, and the ...
For wider area communications, wireless local area network (WLAN) is used. WLANs are often known by their commercial product name Wi-Fi. These systems are used to provide wireless access to other systems on the local network such as other computers, shared printers, and other such devices or even the internet.
Headphones that use cables typically have either a 1 ⁄ 4 inch (6.4 mm) or 1 ⁄ 8 inch (3.2 mm) phone jack for plugging the headphones into the audio source. Some headphones are wireless, using Bluetooth connectivity to receive the audio signal by radio waves from source devices like cellphones and digital players. [ 5 ]
Most Bluetooth headsets implement both Hands-Free Profile and Headset Profile, because of the extra features in HFP for use with a mobile phone, such as last number redial, call waiting and voice dialing. The mobile phone side of an HFP link is Audio Gateway or HFP Server. The automobile side of HFP link is Car Kit or HFP Client.
A typical Bluetooth mobile phone headset from the early 2000s A handheld, waterproof JBL Bluetooth speaker with a rechargeable battery, made in the late 2010s. Wireless control and communication between a mobile phone and a handsfree headset. This was one of the earliest applications to become popular. [38]
In 2003, Plantronics introduced the CS50 wireless headset for use on office phones. Since that time, Plantronics has manufactured other wireless headsets, including the "CS70N", [11] CS500 Series, and Savi 700 Series. In recent years there has also been strong focus on Unified Communications headsets and speakers. [12]
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