1.4 x 4 Matrix with 16 Button keypad setup provides 16 keys arranged in a matrix to simplify input and reduce I/O pins required on your microcontroller. Compatible with microcontrollers - Works with common platforms (Arduino, ESP, PIC, and other MCUs) using standard keypad scanning techniques. Dimensions - 39 mm x 43 mm x 6 mm: compact, low-profile form factor for tight spaces and slim enclosures. Key benefits - Efficient MCU integration: read 16 keys with minimal wiring and I/O usage. - Space saving design: small footprint fits inside compact projects and handheld devices. - Reliable input for embedded systems: straightforward, predictable button detection with standard scanning methods. Use scenarios - Arduino projects needing a 16-function keypad for menu navigation or mode selection. - Small robotics controllers or remote interfaces requiring multiple input options without adding bulk. - Portable instruments or configurations pads where on-device input is needed in a compact footprint.