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Hi: Contacted Shark Marine and as per someone else's message the prototype is $1800 US, has 120' range per side, manochrome, doesn't record and will be likely suppercided(sic) by the SPORT SCAN. They sent me a 2-page brochure and the unit will be priced at $3700 US. Unit is 330kHz and has a 400' range each side and requires a Pentium 100MHz or better computer (not included). They're located at www.sharkmarine.com and will send a email if you inquire.Good hunting.