Yealink SIP-T21P E2 Entry Level IP Phone with PoE, Backlight

The range of alternating current voltage that an AC adapter can accept, expressed in volts (V). It specifies the minimum and maximum supply voltages compatible with the device, ensuring safe operation across different regions and power standards.

The electrical potential difference supplied by the AC adapter to a device, expressed in volts (V). It indicates the nominal voltage that the charger outputs and is used to match the adapter with compatible equipment.

Indicates whether the device can display the caller’s name or number when receiving a call. A value of Yes means the feature is available, while No means it is not supported.

The linear measurement of an object from front to back or top to bottom, expressed in a physical unit such as millimeters, centimeters, inches, etc. It indicates how deep the item is and can be used for fitting, compatibility, or spatial planning.

The visual technology used by the product’s screen, such as LCD, LED, OLED, TFT or analog. It indicates the underlying display panel that determines image quality, color reproduction and power consumption.

The pixel dimensions of a display or image, expressed as width by height (e.g., 1920x1080). It indicates how many pixels are used to render visual content and is commonly used for monitors, TVs, smartphones, cameras, and digital images.

Indicates whether the product includes an Ethernet LAN interface for wired network connectivity, allowing data transmission over RJ‑45 or compatible cables.

The category of a telephone handset indicating whether it is wired or wireless. It helps buyers understand the connectivity method and compatibility with phone systems.

The vertical dimension of a product measured from its lowest to highest point. It is expressed in a physical unit such as millimetres, centimetres or inches and applies to any item where height is relevant, including books, electronics, furniture and other objects.

The physical configuration or method used to secure a product, such as clamp, bolt‑through, vertical, horizontal, rack mounting, freestanding, wall mounting, or other installation approaches.

Indicates the general classification or type of an item, such as "laptop", "projector", "router" or "paint". It helps users quickly identify the nature of the product and compare similar items across categories.

Indicates whether a device has a touchscreen interface that can detect touch input. The value is "Yes" if the device includes a functional touchscreen, and "No" otherwise.

Lista de los códecs de audio que el producto puede usar para la transmisión o grabación de voz, separados por comas. Cada valor representa un formato válido de compresión y codificación de señal de voz compatible con el hardware o software del dispositivo.

Indicates whether the product can be securely mounted to a wall or other vertical surface using standard mounting hardware.

Indicates whether the product has built‑in Wi‑Fi capability, allowing it to connect to wireless networks without requiring external adapters or dongles.

The horizontal measurement of a product, expressed in a linear unit such as millimetres or inches. It indicates how wide the item is from one side to the other and is used for sizing, fitting, and compatibility purposes.