I don't know anything about this. Got it out of a storage unit m will ship as soon as possible. The Hummingbird PMAX170 is a head unit designed specifically for fishing, providing users with essential fishfinding capabilities. This product, although untested, offers the reliable and accurate information anglers need to enhance their fishing experience. Built by the reputable brand Hummingbird, this fishfinder is sure to meet the demands of avid fishermen looking to make their time on the water more productive and enjoyable.