Weight: 7.5 grams
Keypad dimensions: 70mm x 77mm x 1mm
Length of cable : 83mm
This keypad has 12 buttons, arranged in a 3×4 grid. It’s made of a thin, flexible membrane material.The keys are connected into a matrix, so you only need 7 micro-controller pins (3-columns and 4-rows) to connect the key pad.