Designed for networking your Humminbird(R) devices, the AS EC QDE Ethernet Adapter Cable is required for HELIX 9 Series, HELIX 10 Series, HELIX 12 CHIRP Series, 7x8 HD Series, 8x9ci HD Series, 9x9ci HD Series, 11x9ci HD Series Humminbird products. The Humminbird AS EC QDE Ethernet Adapter Cable is 12 inches in length. FEATURES: Humminbird Ethernet adapter cable Required if you want network capabilities on 7x8 HD Series, 8x9ci HD Series, 9x9ci HD Series, or 11x9ci HD Series 12" long