The 7-Level Communication Builder is a self-contained communication device.  It allows the user to record and play back from 1,2,4,8, or 16 different messages per level.  There are seven levels for recordings, giving you a total of up to 112 messages (in the 16 window settings).  Total record time is 300 seconds.  The unit comes equipped with 5 sturdy frame/overlays in 1,2,4,8, or 16 windows, which will retain your icon sheet (not included).  Re-recording is required when you change window frames.  Frame size is 8 1/2" X 7".  Size 12 1/2" L X 9 1/4" W X 4" H.  Requires 4 AA batteries.