|Description||The Ei166e is mains powered with built in back-up rechargeable lithium cells.
The lithium cells provide tamper-proof and maintenance free reliable
back-up for the whole ten year life of the alarm. The alarm features a new
and impoved compact optical smoke sensor which is designed to oer the
best response to slow smouldering fires (e.g. sofas, TVs). The sensor also
features a built in sealed mesh screen to provide better resistance to insect
and dust contamination.