16key membrane switch keypad arranged as a 4 by 4 matrix. Singlepiece sensor panel designed for microcontroller projects and embedded control panels. Precision tactile response and stable electrical performance make it suitable for repeated input tasks. Key benefits Simple integration: standardized 4 by 4 matrix layout is compatible with common microcontroller libraries and key scanning routines, enabling quick wiring and programming. Reliable input: membrane switch construction delivers consistent contact and low profile form factor for longterm use in prototypes and finished devices. Space efficient: compact 16key layout provides many input options without occupying significant board area. Clear function mapping: numbered and arranged keys simplify menu navigation, numeric entry, and directional control in user interfaces. Single unit supply: sold as one 16key keypad suitable for testing or upgrading a single device. Features and specifications Key count: 16 keys in a 4 by 4 matrix. Interface: matrix keyboard requires standard row and column scanning (typically eight lines) for connection to microcontrollers. Type: membrane switch keypad with tactile feedback and stable electrical contacts. Performance: designed for precise, repeatable key detection and stable operation in control and input applications. Compatibility: suitable for use with Arduino and other common microcontroller platforms. Practical use scenarios Smart vehicle and robot control: use as a compact control panel for a smart car project to select modes, control direction, or trigger functions. Embedded device menu and data entry: provide numeric input and menu navigation for microcontrollerbased instruments, timers, or configuration interfaces. Prototype and hobby electronics: add user input to DIY projects such as security panels, access keypads, or interactive displays. Quick integration tips Connect rows and columns to digital IO pins on your microcontroller and use a keypad scanning library or simple polling code to read key presses. Debounce in software if you require input stability for rapid presses. Map keys in your code to match the physical 4 by 4 layout for intuitive user control. This membrane keypad provides a compact, dependable input solution for prototyping and small production projects where precision and stable performance are required.