8Before installationIntroduction and InstallationTo avoid malfunction or communication disturbance, do not install the sub monitorstation in the following locations:– Places where vibration or any other kind of impact occurs.– Places where echoing is frequent.– Places where a high concentration of dust, hydrogen sulfide, phosphorus,ammonia, sulfur, carbon, acid, or noxious fumes occur.– Within 2 m (6′7″) of a TV, microwave, personal computer, air conditioner or anyother electrical device.The sub monitor station and AC adaptor are for indoor use only.Do not use it outdoors, otherwise it may malfunction.• Use the flush mount unit (sold separately) when installing the sub monitor stationinto a wall.– Refer to the Installation and Operation Guide that is included with the flushmount unit for details on installing the flush mount unit.Standard installation position of the sub monitor stationPlace the sub monitor station in a location so that your eyes are the same height asthe center of the display.Note:• In areas surrounded by high electrical field, disturbance may occur in the submonitor station’s image or sound.• Be sure to install the sub monitor station more than 5 m (16′5″) away from thedoor station.• Please check that there is a partition of a wall etc. between a monitor station andsub monitor station and attach them.• Do not place any objects within 20 cm (8 inches) of the sub monitor station. Thismay cause communication errors or malfunction.• Do not install the sub monitor station inside a wall, without using the flush mountunit.