Humminbird 720050-1 Model AS EC10 Fishing System Module Extension 10' Cable For use with AS BP, AS GR4, AS GR16, AS GR50, AS HHPGS, AS INTERLINK, AS RSL, AS SYSLINK, AS WX 1, AS YC, 717, 718, 727, 728, 737, 747c, 755c, 757c, 767, 768, 777c2, 778C, 778c HD, 785 c2, 787c2, 787c2I, 788C, 788ci, 788ci HD, 788ci HD DI, 797c2 SI, 797c2I SI, 798C, 798ci HD, 858c, 898c SI, 917C, 931C, 931C DF, 937C, 937C DF, 947C 3D, 955c, 957c, 958c, 967C 3D, 981C SI, 987C SI, 997c SI, 998c SI, 1155c, 1157c, 1158c, 1197c si, 1198c si, MATRIX 10, MATRIX 12, MATRIX 15, MATRIX 17, MATRIX 20, MATRIX 25, MATRIX 27, MATRIX 35, MATRIX 37, MATRIX 45, MATRIX 47 3D, MATRIX 55, MATRIX 65, MATRIX 67, MATRIX 77C, MATRIX 87C and MATRIX 97