Chiboo,
It handles 455 ad 800 khz and I am sure it will be able to use the old 262/455khz standard ducer as well.
You don't miss much! I think there is a misprint in the Specs I just posted. It says the Standard Transducer is the DualBeam Plus and does not mention the Side Imaging Frequencies or Specs. I corrected it, I hope its right!
Robert