1. pet film for key-press panel, used in clean room\n2. embedded installation\n3. surface is smooth and have no pore, saving space. it totally can do no producing dust and non dust\n4. having the water proof function on the easy clean surface. can be sterilized and hands-free, so avoid contact cross contamination. use a new concept design, \n5. meet the new version of gmp. the caller number can be displayed in the lcd, and the volume has four grade for adjustment.