Installation
Wall installation
1.Install the wall bracket to the lower portion on the bottom of the telephone base. Plug the tabs on the bracket into the slots on the telephone base until they click into place.
2.Install batteries to provide power for the AUDIO ASSIST,
MUTE and 
lights. Press the battery cover tabs and remove the cover. Install three new alkaline AA batteries (not included). Make sure to follow the polarity guide in the battery compartment. Replace the cover.
NOTE: The batteries are needed for the AUDIO ASSIST, MUTE and 
lights to work. Replace the batteries when the light is dim or unlit in a dark room. Replace the batteries only with three new alkaline AA batteries.