Dimension : 4cm x 3.5cm x 2cm L x W x H / 1.6in. X 1.4in. X 0.8in. . Splitter Design: 1 RJ45 In and 2 RJ45 female out. Convert and increase your Ethernet connections from 1 to 2 sockets. Convert a single RJ45 outlet to two RJ45 sockets easily. Divide original embedded Ethernet cables 8pins into two groups . Two groups respectively transmit data with purely physical connection . Not the same as a network router, not the function of the assign IP addresses . Easy to operate, plug and play, no extra driver needed . Small and lightweight.