Introducing the new 4G GSM audiokits that are manufactured in the familiar modular 4000 series range with a 316-grade stainless steel matt finish. They are available from single call button applications up to 12 button kits (surface or flush), however is expandable up to 50 call buttons, all with the facility to divert to additional numbers if the first is busy or unanswered (up to 3 divert numbers per button). The 4G GSM intercom module is able to connect to 2G, 3G and 4G networks and is designed for global use. The 4G GSM audiokits have all the original features of the previous GSM PRO series kits, however they now include new programming features. In addition to the existing 1000 dial-to-open numbers (with access levels) it can store up to 32 temporary dial-to-open numbers that are programmable from 1 - 255 hours. It also includes an automatic time correction feature (for when the 4G GSM is used in different time zones) and daylight saving time adjustments. The RS485 bus connectivity allows the 4G GSM module to be expanded to a networkable access control system (up to a total of 8 devices) which can include both proximity, using the new Art.4850R off board expansion reader, and coded access, using the new Art.4903 keypad.