I have the Bullet as well and it works great! I use it to amplify a weak wifi hotspot provided by my cable company.

The POE injector I use is a 12v input model :

from B&H catalog:

https://www.bhphotovideo.com/bnh/controller/home?O=&sku=1204329&gclid=Cj0KEQjwr7S-BRD96_uw9JK8uNABEiQAujbffMPITDt6jgI1v37vyDS-1NKkjli7ScyUTGTs_XpVvIoaAmU-8P8HAQ&is=REG&ap=y&m=Y&c3api=1876%2C92051677562%2C&A=details&Q=

passive power over ethernet
model APOE 02-WM

I can feed it with a 110 to 12v adapter while on shore power, or use a 12 volt plug while underway. Can't beat the price!