Hi RJMac1,
The Meraki Go GR10 includes a wall plug, part number GA-PWR-12W-US (or EU/UK depending on your location). There is no POE injector as part of the Meraki Go product line. Any 802.3at POE injector should work, or if you prefer a Meraki solution, the MA-INJ-4-US is compatible, with EU, UK and AU versions also available.
Lee