scarabmike,

You asked where I purchased my gps speedo & receiver, it's been awhile,
but it was either livorsi marine, or directly from gaffrig. Go online to either one
they will show a picture, hope this helps you out. One Ofthe features I like
is at the end of the day you can hit the recall switch an tell what the fastest
speed you reached that day. That speed will stay on the speedo until you erase it.