MCAK707NSSBWPMM - Multicomp - Klávesnice, 3 x 4, Matrice
Amazon.com: MCU Keyboard, 3x4 Keyboard with Standard Star(x) and Hash(#) Symbols, Keyboard Module with 12 Keys, SingleHanded Keypad, Suitable for Game Lovers : Electronics
text input - 3x4 keypad only types numbers even when in the letter mode is shown - Android Enthusiasts Stack Exchange
Single Chip Microcomputer Keyboard Key Matrix Keyboard 3*4/3x4 Keyboard 12-key Keyboard Keyboard Module Spot - Water Tanks - AliExpress