The ET22161 Series is an Unmanaged Rack-mount 16-port 100M SFP + 2-port 10/100/1000 TX Optical Ethernet Switch. It offers the flexibility by using external SFP to connect with up to 16 fiber links of 100Mbps and provide 2 Gigabit Ethernet uplink ports. It supports 802.3x Flow Control with 8K MAC addresses. 

The 1U 19" Rack-mount ET22161 Optical Ethernet Switch has equipped AC power input (100 - 240VAC) and 1Mbits buffer memory for stable system performance. It is designed for the operation temperature range in  0°C to 50°C (32°F to 122°F) and offered with a 5-year warranty.