HUMMINBIRD PIRANHAMAX 4 DIPiranhaMAX 4 DI Clearer Vision Below the SurfaceSharper imaging. Sharper results. The PiranhaMAX 4 DI delivers a crisp and vivid underwater view with its 4. 3" color LCD screen and modern styling. This fish finder combines powerful Down Imaging technology and intuitive controls in a compact, user friendly design, making it easier than ever to locate fish and underwater structures. Down ImagingGain a highly detailed, photo like view beneath your boat.