The shielding membrane switch is also called the Shielding layer membrane keypad or Shielding membrane keyboard. Shielding layer membrane switch can well prevent the influence of static electricity and damage to the switch equipment. The shielding material usually is PET. It is working Temperatureis -20~60℃, and its working Humidity is 40℃， RH<95%. And usually, the switch Button working life is about a 100million times.