●Plug-and-Play - Easy Setup with No Software or Configuration ●Power over Ethernet - 16 Gigabit PoE Plus Ports (802.3af and 802.3at) with up to 30W per Port and 76W PoE Total Power Budget ●Flexible Mounting - Rack, Desktop or Wall Mount for Use in Any Environment ●Flexible Performance - Interchangeable External Power Supply (90W, 130W, 200W) to Increase or Decrease Your PoE Budget ●Small, Stable Metal Case and very quiet, because fanless