HUMMINBIRD Dual Helix Starter Kit, HWAL, MI Dual Helix Starter Kit, HWAL, MI, MFG# 700062-1, for networking two Ethernet-equipped HELIX models on an aluminum boat. Includes transom mount CHIRP transducer, 20' Ethernet cable, 2 Ethernet adapters, Side/Down Imaging splitter, and MEGA adapter cable.