S3218-16ET-135 , Type Unmanaged , Switch layer L2 , 16xBasic switching RJ-45 Ethernet ports quantity , Basic switching RJ-45 Ethernet ports type Gigabit Ethernet (10/100/1000) , 2xSFP module slots quantity , Switching optical modules type Gigabit Ethernet , Transmission distance (max) 0.25 km , Switching capacity 7.2 Gbit/s , Throughput 5.3568 Mpps , Rack mounting Yes , Stackable Yes , Form factor 1U , Product colour Black , Power source AC , Power over Ethernet (PoE) Yes , 2xPower over Ethernet (PoE) ports quantity , Total Power over Ethernet (PoE) budget 135 W , Width 440 mm , Depth 300 mm , Height 44 mm