Model: 3x4 key. Compact 4x3 12button matrix keypad module for numeric and function input. Overview Standard 3 x 4 layout with 12 keys: numbers 0 to 9 plus star * and hash # Matrix wiring simplifies scanning and minimizes I O lines required Size: 7 x 5 x 1 cm, Weight: 19 g — compact and lightweight for embedded projects Easy to interface with microcontrollers and development boards using simple row and column scanning Key benefits Fast integration: the matrix design lets you add numeric input to projects without complex wiring Space efficient: small footprint is ideal for compact enclosures and portable devices Clear functionality: includes ten numeric keys and two function keys for PIN entry, menu navigation, or command input Ready for prototyping: suitable for breadboard or PCB mounting when paired with a matching connector and wiring Important specifications Keypad number: 12 keys in a 3 x 4 arrangement Key layout by row: 1st row: 1 2 3 2nd row: 4 5 6 3rd row: 7 8 9 4th row: * 0 # Physical dimensions: 7 x 5 x 1 cm Weight: 19 g Package contents: 2 x 12key keypad modules Applications and use scenarios Access control panels and PIN entry systems where compact numeric input is required DIY electronics, microcontroller prototypes, and hobby projects that need reliable numeric or command input Custom user interfaces for small devices such as timers, kiosks, or simple data entry terminals Compatibility and integration Communicates easily with most microcontrollers and development boards using standard row and column scanning routines Use with common GPIO or digital input expanders to read key presses with minimal code and hardware This 3 x 4 key keypad module provides a straightforward, space saving solution for adding numeric and function entry to electronic projects. Package includes two identical 12key modules for multiple uses or spare parts.