I've been on the phone with Humminbird while in the boat. Several weeks ago I downloaded and saved to my computer the owner's manual. I put a copy on a thumb drive and took it down to my local Fedex office and printed it out. I keep the owner's manual on the boat with me at all times. The contact number in the manual is: 800-633-1468. Hours are M-F 8:00-4:40 CST.