I bought one of these units and used it about 3 times and then sold it for about half price. I thought I would try to save some money in buying a cheaper unit than the HD units but I ended up getting an HD after the fact. I really didnt like anything about the elite 7 unit at all. It was cheaper but in electronics you get what you pay for!!!!!!!!!!! I ended up putting an HD 5 on the bow to run my maps and also put a Humminbird 360 and a 1159ci HD DI to operate it with.