THE SMART TRICK OF MERAK555 THAT NO ONE IS DISCUSSING

If mounting to a wall or ceiling, the Ethernet cable will feed from powering the MR55. The "ability resource selections" portion of this doc lists the several powering solutions and their exceptional attributes.  The MR55 attaches for the mount cradle with two tabs around the cradle that insert into your MR55, and is secured for the cradle utiliz