Features: (USB TO RJ45) Weight: 22g Size: 6.8 x 1.8 x 1.8 cm Single chip USB to Fast Ethernet controller RJ45 Shield phone jack Switch 10Mbps or 100Mbps network automatically Integrated Fast Ethernet MAC, physical clip and transceiver in one chip Network Speed:10Mbps and 100Mbps N-way auto-negotiation operation Compliant to USB interface version 1.0/1.1/2.0 Full-speed (12Mbps) USB 1.1 device ( USB 1.1 Standard ), can not reach 480Mbps(USB 2.0 standard) Support all USB standard commands Support suspend/resume detection logic Support 4 endpoints 1 control endpoint with maximum 8-byte packet 1 bulk in endpoint with 64 bytes/packet 1 bulk out endpoint with 64 bytes/packet 1 interrupt in endpoint with 8 bytes/packet 18 bytes SRAM built in (2K bytes for Tx buffer, and 16K bytes for Rx buffer) Use 93C46 to store resource configuration, ID parameter, etc Half/Full duplex 10/100Mbps operation Support Full Duplex Flow Control (IEEE 802.3x)