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These have a 0.281 in (7.1 mm) diameter shaft with four conductors, allowing two for the headphones, and two for the microphone. Also used is the U-384/U (Nexus TP-105), which has the same diameter as the U-174/U but is slightly longer and has 5 conductors instead of 4.
A phone connector (tip, ring, sleeve) also called an audio jack, phone plug, jack plug, stereo plug, mini-jack, or mini-stereo. This includes the original 6.35 mm (quarter inch) jack and the more recent 3.5 mm (miniature or 1/8 inch) and 2.5 mm (subminiature) jacks, both mono and stereo versions. There also exists 4.4 mm Pentaconn connectors.
Two pins are used for the mono headphone signal and two pins for the unbalanced microphone signal. The 4-pin XLR connector is also commonly used on amateur radio microphones, but transferring unbalanced audio instead, and using the 4th pin (with the common ground) for a push-to-talk (PTT) circuit activated by a button on the microphone.
I/O ports: 2 USB 3.0, 1 USB 2.0, 1 HDMI port, 4-in-1 SD Card Reader, 1 Ethernet port, 1 combined headphone/microphone jack, 1 security lock, 1 power adapter port. 3148: — [ 21 ] — this model features a HDMI port, 1x USB 3.0 and 2x USB 2.0 Type-A ports, a headphone/microphone combo (headset) port, a media-card reader and a security-cable slot.
The Zx & ZxR were both bundled with the Audio Control Module (ACM) which is basically an extension cord for headphones. The ACM contains both 1/4" and 3.5 mm headphone and microphone jacks, a potentiometer headphone volume knob, and a built-in dual-microphone Beamforming array. The ACM uses a red color theme that matches the card.
General 3.5 mm computer headsets come with two 3.5 mm connectors: one connecting to the microphone jack and one connecting to the headphone/speaker jack of the computer. 3.5 mm computer headsets connect to the computer via a sound card, which converts the digital signal of the computer to an analog signal for the headset. USB computer headsets ...
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