The 403 is now a 2-place panel mount, voice-activated stereo intercom with instant
music muting and pilot isolate. Easy to use. Can be mounted horizontally or
vertically to fit almost anywhere. Ordering Part Number 103-0612-20 (2-Place jack
kit) or Part Number 103-0612-10 (4-Place Jack Kit) allows you to upgrade to a 4-
Place or 6-Place intercom. Note: For additional Switch and Face Plates, Part
Number 103-0020-00 (2-Place Switch and Face Plate Kit) is required.