Yealink MVC640 Video Conferencing System

The electrical potential difference that a device is designed to accept from its power source, expressed in volts (V). It indicates the nominal operating voltage for the product and helps users verify compatibility with local mains or battery supplies.

The angular extent, measured in degrees, that a camera can capture or display across its sensor or lens. It represents the maximum width of the scene visible to the user without moving the device and is commonly used to compare lenses, sensors, and camera systems.

The minimum and maximum focal lengths that a lens or optical system can cover, expressed in millimetres (mm). It indicates the zoom capability of the device and helps users understand the field‑of‑view range available.

The span of frequencies, expressed in hertz (Hz), that a device can operate within or respond to. It may be given as a single value, a numeric range (e.g., "20 000‑50 000 Hz"), or an open‑ended interval such as "2.4 GHz+" indicating the lower bound only.

The ratio of the desired signal level to the background noise level, expressed in decibels (dB). It indicates how clearly a device can transmit or receive audio or other signals relative to unwanted interference. A higher value means better clarity and fidelity.

The electrical power rating of a speaker or audio output device, expressed in watts (W). It indicates the amount of energy the speaker consumes during operation or the maximum output it can deliver to connected equipment.

The type of physical storage medium that a product uses or supports, such as flash memory, hard disk drive (HDD), solid‑state drive (SSD), eMMC, or combinations thereof. It indicates the underlying technology for data persistence and helps users compare devices based on their storage capabilities.

The minimum and maximum angles, expressed in degrees, that a monitor can be tilted or adjusted vertically while maintaining acceptable performance or usability. It indicates the tilt limits for displays such as monitors, stands, or other adjustable equipment.

The total count of USB 3.2 Gen 1 (also known as USB 3.1 Gen 1 or SuperSpeed) ports available on the device, indicating how many peripherals can be connected simultaneously via this interface.

Indicates whether the product can be configured and monitored through a web interface accessible via a browser, allowing remote administration over a local or internet connection.