HOW MUCH YOU NEED TO EXPECT YOU'LL PAY FOR A GOOD MERAK555

If mounting to the wall or ceiling, the Ethernet cable will feed from driving the MR55. The "electrical power resource solutions" section of the doc lists the several powering solutions and their unique properties.  The MR55 attaches to the mount cradle with two tabs around the cradle that insert into your MR55, and is also secured into the cradl