This lot of 10 SFP-GB-GE-T Copper RJ45 Transceiver Modules are perfect for upgrading your network. They are designed for use with switches and hubs and have a maximum reach of 100m. These modules allow for transmission speeds of up to 10/100/1000Base-T and are compatible with a range of network ports. The units are versatile and can be used for a range of applications in enterprise networking, servers, and computers/tablets & networking. They are a great option for anyone looking to expand their network capabilities. These modules have been tested and are in excellent working condition.