The "Allelectrics 2-Gang 47mm Patress Box" is an electrical accessory used for housing electrical fixtures. Here’s a detailed breakdown of its features:

Allelectrics: Likely the brand or supplier name.
2-Gang: Indicates that the box is designed to accommodate two standard-sized electrical outlets or switches side by side.
47mm: Refers to the depth of the patress box. A 47mm depth provides more space than the standard 35mm, which is beneficial for installations requiring additional room for wiring and connections.
Patress Box: Also known as a back box, it is an enclosure mounted in or on a wall to house electrical fittings such as switches, sockets, or other fixtures.

Purpose and Use:

Installation: The patress box is typically installed within a wall cavity (for flush mounting) or on the surface of a wall (for surface mounting). The deeper 47mm box is particularly useful where more space is needed for wiring.
Housing and Protection: It houses the wiring connections and provides a secure mounting point for electrical outlets or switches, protecting the connections from external damage.
Compatibility: Designed to be compatible with 2-gang electrical devices such as double switches or double sockets.

Applications:

• Residential and Commercial Buildings: Used in a variety of settings to install electrical outlets or switches.
• Versatility: Suitable for new installations or for replacing existing boxes where additional depth is beneficial, such as in installations with larger wiring requirements or when fitting deeper electrical components.

Overall, the Allelectrics 2-Gang 47mm Patress Box is a fundamental component in electrical installations, providing extra depth for easier wiring and ensuring safety and stability for electrical connections.