The OM2P-HS was updated in April, 2014. The new device has twice the transmission power (200 mW vs 100 mW) and supports passive PoE OR 802.3af PoE.
You can tell the difference between the two models in two places:
- The new OM2P-HS has a 'V2' at the end of the model name. You can find the model name on a decal on the bottom of the unit.
- The new OM2P-HS has an "802.3af POE" label on one of the ports.