Home About Us Contact Romana  GPS AVL Systems  CNC Foam Cutters  Intercoms    Central Unit    Interior Unit    Digital Key    Electromagnetic Lock    Floor Distributor    Power Supply    Door Shock Absorber  PC Audio   DIGITAL KEY INTERCOM SYSTEMS Digital Key - use by touching on the central unit contacts - easy to keep with your keys; - easy to use and high fiability; - contains a coded integrated circuit, no batteries or acumulators.         © ERC - 2005