diff --git a/docs/HARDWARE.md b/docs/HARDWARE.md
index 53c34a7..4032925 100644
--- a/docs/HARDWARE.md
+++ b/docs/HARDWARE.md
@@ -9,4 +9,9 @@ Remove main sticker from back (just move it to the front).
 Remove two screws that were under the sticker.
 
 ## Power
-12V power header??? VCC/GND in center of board ?
+The EW-72 can be powered straight from the PCB, bypassing the need for PoE.
+This is more efficient for power constrained environments.
+
+Dr. Andy Haas in esnail:
+"There's a missing electrolytic cap. I put +15 V on the black side, and gnd on the white. It doesn't work below 14V, sorry."
+