Humminbird 999ci HD SI Combo Fish Finder System, Black 8 inch full-color HD screen Side Imaging reveals 240 ft. section on either side of boat Down Imaging lets you identify structures beneath boat Switch Fire sonar senses fish down to 1,500 ft. Compatible with iPilot, autopilot, radar and 360 Degree imaging Internal GPS New Higher Speed Processor All models can receive SI and 360 Imaging via Ethernet Updated Cosmetics & Cursor Key I-pilot Link Compatibility