SOFTWARE COMPATIBILITY: The EFI737EL is compatible with Project Magenta, LVLD767 through CPflight driver and with PMDG series (737/747) through Flightsimlabs driver. Is also compatible with the EFIS panel of Boeing 737 default of FSX.
For more details please see compatibility table at page http://www.cpflight.com/sito/support/swcomptab.asp

EFI737EL is an expansion module and require CPflight MCP737EL series (or BLKBOX) to work.