Audiovox MMH56 Owner's Manual page 27

PASSWORD VERIFY Input Screen Display
Enter a 4 digit password, then press 'ENTER' to confirm the
parental level setting.
NOTE: For 1st time use, the default password is 3308.
e. Select 'PASSWORD' using UP/DOWN, and then press RIGHT
to enter the submenu.
PASSWORD CHANGE Screen Display
Press 'ENTER' to enter the Password Change Page. Input
the Old Password or the Default Password, the New Pass-
word, and the Confirmed New Password. Press 'ENTER' to
confirm the change.
PASSWORD CHANGE PAGE Screen Display
26