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The head mount freed the switchboard operator's hands, so that he could easily connect the wires of the telephone callers and receivers. The head-mounted telephone receiver in the singular form was called a "headphone". These head-mounted phone receivers, unlike modern headphones, only had one earpiece. By the 1890s a listening device with two ...
Plantronics manufactures mobile headsets, including a line of Bluetooth headsets for mobile phones. The Pulsar 590, for example, is designed for use with Bluetooth- and A2DP-enabled cellphones. Computer and gaming headsets. Plantronics manufactured headsets for PC audio and online and console gaming via its GameCom and .Audio and RIG Gaming labels.
A handset is a component of a telephone that a user holds to the ear and mouth to receive audio through the receiver and speak to the remote party using the built-in transmitter. In earlier telephones, the transmitter was mounted directly on the telephone itself, which was attached to a wall at a convenient height or placed on a desk or table.
Head-mounted display. A head-mounted display ( HMD) is a display device, worn on the head or as part of a helmet (see helmet-mounted display for aviation applications), that has a small display optic in front of one ( monocular HMD) or each eye ( binocular HMD). HMDs have many uses including gaming, aviation, engineering, and medicine.
These mobile telephones were usually mounted in cars or trucks (thus called car phones), although portable briefcase models were also made. Typically, the transceiver (transmitter-receiver) was mounted in the vehicle trunk and attached to the "head" (dial, display, and handset) mounted near the driver seat.
USB On-The-Go ( USB OTG or just OTG) is a specification first used in late 2001 that allows USB devices, such as tablets or smartphones, to also act as a host, allowing other USB devices, such as USB flash drives, digital cameras, mouse or keyboards, to be attached to them. Use of USB OTG allows devices to switch back and forth between the ...
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