This is a new 4x3 matrix twelve key membrane switch keypad that is easy to use and will look nice in your project. It's very useful if you need it for prototyping with a breadboard or just need a keypad for your project.

Specification

• Pad Size : 68.9 x 76 x 0.8mm
• Cable Length : 3-1/3" or 85mm (include connector)
• Connector : Dupont 7 pins, 0.1" (2.54mm) Pitch
• Mount Style : Self-Adherence
• Max Circuit Rating : 35VDC, 100mA
• Insulation Spec. :100 MOhm, 100V
• Dielectric Withstand : 250VRms (60Hz, 1min)
• Contact Bounce : <=5ms
• Life Expectancy : 1 million closures
• Operation Temperature : -20 to +40 °C

Here is a TUTORIAL how to use this keypad with an Arduino. https://lastminuteengineers.com/arduino-keypad-tutorial/

From right to left having numbered keypad in front of you:

• pins 1,2 and 3 are columns
• pins 4,5,6 and 7 are rows