If networking 2 Humminbird(R) products, 2 AS EC QDE cables plus 1 Humminbird(R) Ethernet cable is required; If networking 1 HELIX(R) 7 G2N Series, HELIX(R) 9 Series, HELIX(R) 10 Series, HELIX(R) 12 CHIRP Series, 7x8 HD Series, 8x9ci HD Series, 9x9ci HD Series or 11x9ci HD Series product with a pre-2014 8x8, 9x8 or 11x8 Series product, only 1 AS EC QDE adapter plus 1 Ethernet cable is required; Software updates may be necessary on select 700 series (7x8 HD), 800 series (8x8c), 900 series (9x8c) & 100 series (11x8c) models;