... line displayFeatures:Display,Emergency Button,Multi-Language,Capabilityes,Option Board Available.PROISFrequency:UHF,VHFKeypad:FullMil Spec:810 C, ... Type:MobileSignaling:DTMF,MPTSupported Technologies:AnalogThe GM1280 is designed to satisfy the most demanding user with the most ... that allows third-party developers to create applications that run on a separate option board to control, modify or expand ...