Flexible and economic solution for 1GbE adoption Equipped with an RJ-45 connector and supports IEEE 82.3an/bz (1GBASE-T/NBASE-T) and 82.3x, E1G18-T1 helps you smoothly migrate to a 1GbE networking environment with your existing infrastructure. Supporting backward compatibility and auto-negotiation between 1Gbps, 5Gbps, 2.5Gbps, 1Gbps, and 1Mbps, E1G18-T1 is an economic solution to overcome the data transmission bottleneck for small businesses and home users. 5 year warranty Built to handle intensive workloads, Synology network add-in-cards are backed by Synology's 5 year limited warranty.