Mobile Device Accessories — CompTIA A+ 220-1201 (1.2) Flashcards

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Stylus

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A stylus is a pen-like input device for touchscreens, offering precise control and finer input than a finger. Many connect via Bluetooth and support pressure sensitivity and programmable buttons.

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Apple Pencil

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The Apple Pencil is a proprietary stylus designed for Apple iPads that enables advanced features like high-resolution pressure sensitivity and tilt detection. Compatibility with specific iPad models is required to access all features.

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Bluetooth Pairing

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Bluetooth pairing establishes a wireless link between two devices so they can communicate securely. Paired connections often allow feature-rich interactions such as button mapping, battery status, and pressure-sensitive input data.

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Pressure Sensitivity

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Pressure sensitivity lets a stylus report how hard it is pressed on the screen or tablet, enabling variable line thickness and other expressive input in drawing apps. It requires both a compatible stylus and compatible input device or software.

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Stylus Buttons

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Stylus buttons provide quick-access functions like erasing or switching tools without touching the screen. Their behavior depends on device compatibility and the app being used.

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Wired Headset

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A wired headset connects to a device using a physical connector such as USB, Lightning, or TRRS, providing audio and microphone capability without battery dependence. Wired headsets are often simpler to pair and can be more reliable for continuous use.

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TRRS

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TRRS stands for Tip-Ring-Ring-Sleeve, a four-conductor analog audio connector that supports stereo audio plus a microphone. It is commonly called an analog audio jack and differs from TRS by having the extra ring contact.

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Lightning Connector

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The Lightning connector is Apple’s proprietary digital connector found on older iPhones and some accessories. Some wired headsets use Lightning instead of USB or TRRS to connect directly to Apple devices.

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USB Headset

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A USB headset uses a USB port for audio and microphone signals, often providing digital audio quality and plug-and-play convenience on computers and many mobile devices. It may also expose additional features like inline controls or virtual surround.

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Wireless Headset

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A wireless headset connects via Bluetooth or another wireless protocol, offering cable-free use and portability. It requires battery power and may have limited range, so users should plan for recharging.

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Wireless Speaker

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A wireless speaker receives audio from a mobile device over Bluetooth, providing improved fidelity and portability over built-in phone speakers. These speakers run on batteries and are designed for use within the Bluetooth range.

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Bluetooth Range

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Bluetooth range determines how far a wireless accessory can be from the host device while remaining connected, typically about 10 meters for classic Bluetooth. Range varies with device class, obstacles, and interference.

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External Camera

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An external camera or webcam connects to a computer, usually via USB, to provide video capture and conferencing capability for systems without built-in cameras. It can be used for streaming, recording, or video calls.

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Docking Station

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A docking station provides a desktop-like set of ports (video, USB, network, audio) and may accept expansion cards, enabling quick connect/disconnect for a specific laptop model. It is ideal for permanent workstation setups.

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Port Replicator

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A port replicator is a portable device that connects typically via USB to provide common ports like video, USB, and card readers for many laptop models. It is more universal than model-specific docking stations but usually does not support expansion cards.

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Trackpad

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A trackpad is a touch-sensitive surface used to control the cursor without a mouse, often built into laptops. External trackpads are available for desktops and connect via Bluetooth or USB, offering multi-finger gestures for advanced navigation.

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Drawing Pad

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A drawing pad (external digitizer) provides a flat surface and stylus for precise artistic input on desktop or laptop computers. It usually connects via USB or Bluetooth and replicates tablet-like drawing capabilities for non-touch systems.

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Function Key (Disable Trackpad)

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Many laptops include a function key combination (e.g., Fn + F10) to disable the trackpad temporarily, preventing accidental cursor movement while typing. This is useful when using an external keyboard or mouse in tight spaces.

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MicroSD/SD Reader

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A microSD/SD card reader built into port replicators or laptops allows direct access to removable storage cards for cameras and mobile devices. It simplifies file transfers without using separate adapters or cables.

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Analog Audio Jack

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The analog audio jack is a physical connector for audio signals, often implemented as TRS or TRRS plugs. It supports stereo output and microphone input in compatible headsets, depending on wiring standard.