TP-Link SG1048 Gigabit 48-Ports Switch Unmanaged4pcs per master boxDetail Specifications 1.100% Data filtering rate eliminates all error packets2.Supports IEEE 802.3x flow control for Full Duplex mode and backpressure for Half Duplex mode 3.Non-blocking switching architecture forwards and filters packets at full wire-speed for maximum throughput 4.96Gbps Switching Capacity5.Auto MDI/MDIX eliminates the need for crossover cables 6.Supports MAC address auto-learning and auto-aging7.Support the port N-Way Auto-Negotiation, Store and Forward. 8.Compact size design for desktops, Rackmountable9.Plug and Play design simplifies installation Hardware Features:INTERFACE:48 10/100/1000Mbps RJ45 PortsAUTO Negotiation/AUTO MDI/MDIXMAC ADDRESS TABLE:8KEXTERNAL POWER SUPPLY:Input: 100 - 240VAC, 50/60Hz Output: 12VDC/8.5A Software Features:TRANSFER METHOD :Store and ForwardADVANCED FUNCTIONS:802.3X Flow Control, Back PressureAuto-Uplink Every Port Others:CERTIFICATION:FCC, CE, RoHsPACKAGE CONTENTS:48-Port Gigabit Desktop SwitchPower AdapterUser Guide Item Dimension (L"xW"xH"):21 x 4 x 10Weight:15.50 lbWarranty Information :2 Year