Adapter cable for connecting to the Ethernet network of Humminbird series devices: 7x8, 8x9, 9x9, 11x9, Helix 9, Helix 10, Helix 12 CHIRP, Helix G2N. The cable length is 30 cm. Two adapters are required to connect the two indicated devices to the network. To connect to devices manufactured before 2014, you need one adapter and an Ethrnet cable. 7x8 HD series and 8x9c, 9x9c and 11x9c instruments may require a software update.