Membrane keyboard:

• made of polyester - 145,5 x 93,5 x 0,7 mm/
  5.73 x 3.68 x 0.03 inch
  
• 2-colour printing on the back side
• touch areas stamped
  (button order stamping)
• display- and LED-area
  matt transparent (colourless)
• 8 pieces gilded snap dome
  12 mm/ 0.47 inch
• integrated safety chamber
• 4 integrated canals for slot strips
  (can be slided in from the rear side)
• ready-made and laminated
• 100 % electronically tested

Printed circuit:

• made of FR4 145,1 x 93,1 x 3,2 mm/
  5.71 x 3.67 x 0.13 inch
  contact point gold-gold
• plated-through, solder resist
• milled
• 4 x bolts M 3x15 press-fitted
• assembled on the rear side:
  25 x terminal strip
  4 x LED wired, colour: green 20mA
  4 x LED wired, colour: yellow 20mA
  12 x resistance 2K2, 2 W