This is an I-O DATA Gigabit Ethernet switching hub ETG-ESH16NA (16 ports). It was in operation until just recently. It is being sold due to equipment replacement. Power cable included. ■ "ETG-ESH16NA" is a 16-port switching hub compatible with 1000BASE-T/100BASE-TX/10BASE-T. ■ It is a "solid power-saving" model that employs three power-saving technologies. It is equipped with a power-saving function and can cut power consumption by up to approximately 67% during standby. ■ The energy-saving level is the highest, 5 stars. The energy consumption efficiency is 0.5W/Gbps, achieving a 206% achievement rate of the 2011 energy-saving standards. ■ Supports jumbo frames up to 9216 bytes. ■ Employs a highly reliable data transfer method, "store & forward," which checks packets inside the hub and confirms that the data is not corrupted before transferring the data to the destination port. ■ Equipped with a "loop detection" function that detects and notifies of network loop configurations that can cause major network operation failures. ■ Employs a highly heat-dissipating metal body. It suppresses temperature rise and power consumption, and realizes a fanless design. ■ Reliable Japanese-made electrolytic capacitors are used in the power module of this product. ■ Automatically identifies and connects to 1000BASE-T, 100BASE-TX, and 10BASE-T networks.