The Black Box LGB304A is a compact gigabit Ethernet switch with four 10/100/1000 Mbps RJ45 ports. Typical applications include LAN connectivity for small workgroups. 
The switch is ideal for mobile teams such as auditors that require a small, portable switch to expand port counts. The switch can be powered from a USB port or from the included power adapter. The switch delivers line rate, non blocking throughput. Ports are autonegotiating half/full duplex and include LED indicators to view port status. This unmanaged switch is plug and play and does not require any configuration.
						
					 
				
			 
		
			
				
			
				
					
						
							Filtering and Forwarding Rate —  
10 Mbps: 14,880 pps;
100 Mbps: 148,800 pps; 
1000 Mbps: 1,488,000 pps
MAC Addresses — 1K
Standards — IEEE 802.3 10BASE-T, IEEE 802.3u 100BASE-TX, IEEE802.3ab 1000BASE-T, IEEE802.3x Flow Control
Switching Method—Store-and-forward
Connectors —  (4) RJ-45, (1) Power
Indicators — 
LEDs: Per Unit: (1) Power;
Per Port: (1) LINK/ACT, (1) 1000M
Power — From computer's USB port via power cable (included) or 100-240 VAC, 50-60 Hz external power supply (included);
Output: 5 VDC, 1.2 amps, 6 watts max.
Size — 2H x 6.2W x 7.9D cm (0.8"H x 2.4"W x 3.1"D)
Weight — 0.2 kg (0.4 lb.)