The 7-Level Communication Builder is a progressive communicator that grows with you. Start with one message and grow to sixteen. There are seven levels for recordings, giving you a total of 112 messages (in the 16 window setting). Total recording time is 300 seconds. The unit comes equipped with 5 sturdy frame/overlays in 1, 2, 4, 8, and 16 windows. Re-recording is required when you change window frames.