-20 stations system
-2 positions group selector switch
-10 position line selector switch
-Built-in relay latch timer for activation of external visible or audible 24VDC signal units
-Alarm stop button
-Noise compensated microphone
-Optical LED call indication at front (in addition to audible call signal)
-Flush mounted
-Wall mounting with corresponding metal cabinet type MBOKS
-Desk mounting with corresponding wooden cabinet type VSPK