- Twelve square double-moulded black buttons with white legend on a black ABS body
- Legends are 0 to 9 asterisk & hash
- Buttons operate conductive silicon rubber pads & have a click effect
- Single pole make switches are arranged on a four row by three column XY matrix Specifications Contact rating DC 24 V 20m A Contact resistance 200 Omega max Actuating force 100g plusmn 30g Key travel 1.4mm plusmn 0.4mm Key life 1000000 operations Overall dimensions 51 x 64 x 10.3mm Fixing centres 46 x 59mm