HWg-STE plus PoE is powered over Ethernet (IEEE 802.3af) or from included external power adaptor.
HWg-STE plus PoE is an Ethernet thermometer/hygrometer with two digital inputs for dry contacts.
The package includes a temperature probe and a power adapter. Can be connected to the SensDesk online portal.
http://hw-group.us/device/hwg-ste-plus