One used Lowrance X50 DS 

The transducer (HST WSU WIDE ANGLE) w/ power cord and adjustable arm mount are included. 

Serial number: 100778622 

Version 1.4.0 

Build HS3963

It measures 5 3/8" length X 4 1/4" width, over all.  The viewing screen roughly measures 2 3/8" length X 3 1/8" height. It has a 6 pin male connector, as shown in the pictures. 

It features the Lowrance dual search 83/200 kHz technology, high contrast 240 X 160 film super twist display with 4 levels of gray scale display. The transducer and bracket are included.