Capacity: USB 3.0 to RJ45The RNG-406U supports IEEE 802.3 x flow control for full-duplex mode, and back pressure flow control for half-duplex mode. It is also designed with energy saving in mind: it adopts Energy Efficient Ethernet which saves your energy greatly. The RNG-406U is a simple, economical path to high-speed Ethernet connectivity, giving you solid performance and running usability!