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HOUSTON, May 1 /PRNewswire-FirstCall/ — Input/Output, Inc. (NYSE: IO)
announced today that it will release first quarter 2007 results on Wednesday,
May 9, 2007 after the market closes. In conjunction with the release, I/O has
scheduled a conference call, which will be broadcast live over the Internet,
for Thursday, May 10, 2007 at 9:30 a.m. Eastern Time (8:30 a.m. Central)

    What:   I/O First Quarter 2007 Earnings Conference Call

    When:   Thursday, May 10, 2007 - 9:30 a.m. Eastern Time

    How:    Live via phone -- By dialing (303) 205-0055 and asking for the
            I/O call at least 10 minutes prior to the start time.
            Live over the Internet -- by logging on to the web at the
            address below.

    Where:  http://www.i-o.com.  The webcast can be accessed from the
            home page.

For those who cannot listen to the live call, a telephonic replay will be
available through May 24, 2007, and may be accessed by calling (303) 590-3000
using pass code 11088923. Also, an archive of the webcast will be available
shortly after the call on the company’s website at http://www.i-o.com for
approximately 12 months.

About I/O

I/O is a leading, technology-focused seismic solutions provider. The
company provides cutting-edge seismic acquisition equipment, software,
planning and seismic processing services and data libraries to the global oil
and gas industry. I/O’s technologies are applied in both land and marine
environments, in traditional 2D and 3D surveys, and in rapidly growing areas
like time-lapse (4D) reservoir monitoring and full-wave imaging. Headquartered
in Houston, Texas, I/O has regional offices in Canada, Latin America, Europe,
China, Russia, Africa and the Middle East. Additional information is available
at http://www.i-o.com.

CONTACTS: R. Brian Hanson
Chief Financial Officer
Input/Output (281) 879-3672

Jack Lascar, Partner
Karen Roan, SVP
DRG&E (713) 529-6600

SOURCE Input/Output, Inc.

CONTACT: R. Brian Hanson, Chief Financial Officer of Input-Output,
1-281-879-3672; or Jack Lascar, Partner, or Karen Roan, SVP, both of DRG&E,
1-713-529-6600, both for Input-Output, Inc.
Web site: http://www.i-o.com
(IO)