This is 4×3 Matrix 12 Keyboard Keypad Telephone Style. It is 12 Button Keypad switch, ideal for code or data entry. Each key is rated for up to 1,000,000 life-stroke and also features a durable high-quality material contact surface for best environmental resistances.
This 4×4 Keypad Matrix lets you quickly add controls to your electronics projects. It offers 0-9 numerals, and standard star(*) and hash(#) symbols.
Easy communication with any microcontroller.
Tactile type switches.
Over 1,000,000 operations per key.
Contact rated for 12V dc @ 20mA.