There are three: IEEE 802.11af, at, and bt.
af can deliver up to 12W at the powered device (PD), at delivers up to 25 W, and bt either 51W (Type 3) or 71W (Type 4):
* https://en.wikipedia.org/wiki/Power_over_Ethernet#Standard_i...
Any device you purchase should list the IEEE standard it supports and how much power it may draw.
There are three: IEEE 802.11af, at, and bt.
af can deliver up to 12W at the powered device (PD), at delivers up to 25 W, and bt either 51W (Type 3) or 71W (Type 4):
* https://en.wikipedia.org/wiki/Power_over_Ethernet#Standard_i...
Any device you purchase should list the IEEE standard it supports and how much power it may draw.