This is a single-piece key button membrane switch in a matrix array keyboard keypad control panel pad, ideal for DIY projects. It is available in a 1-key red color option. Key benefits - Precise control with reliable functionality for a variety of applications. - Membrane switch design delivers smooth operation and long-lasting performance. - Simple, straightforward DIY solution for building or upgrading a control panel. What it offers - Function: one-button membrane switch suitable for single-input control in a matrix array layout. - Appearance: red color option to add a visual accent to your project. - Durability: designed for long-lasting performance in everyday use. - Usability: easy to integrate into DIY kits, control panels, keyboards, or custom interfaces. 2-3 practical use scenarios - Build a custom control panel for a small machine such as a 3D printer or compact CNC unit, using a dedicated red key for a critical function. - Add a single input button to a microcontroller project for home automation, robotics, or audio/video equipment control. - Use as a compact input in a custom keyboard, arcade cabinet, or portable controller to provide a reliable, tactile button in a matrix-based layout.