Took my former father- n- law out fishing the other day and when I dropped him off he gave me a older Hummingbird LCR 4000 portable unit, new still in the box. He's probably had it in the garage for over 20 years. He's 86 and is all ways giving me things he has no use for anymore. Nothing fancy but it will do to show the depth and bottom contour. Couldn't beat the price.