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

Specification

• Pad Size : 70 x 77 x 0.8mm
• Cable Length : 3-1/3" or 85mm (include connector)
• Connector : Dupont 8 pins, 0.1" (2.54mm) Pitch
• Mount Style : Self-Adherence
• Max Circuit Rating : 35VDC, 100mA
• Insulation Spe :100M Ohm, 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.