Aico Optical Smoke Alarm Ei146e

The Ei140RC series of mains powered smoke and heat alarms conform with BS 5839 Part 6 Grade D2, as required for extensions, 2 storey HMOs and small businesses. Supplied with an alkaline back up battery and an "easi-fit" base, the Ei140RC series can be interlinked using 3 core and ...The Ei140RC series of mains powered smoke and heat alarms conform with BS 5839 Part 6 Grade D2, as required for extensions, 2 storey HMOs and small businesses. Supplied with an alkaline back up battery and an "easi-fit" base, the Ei140RC series can be interlinked using 3 core and earth cable.

This means when one alarm is activated, it triggers all the other interlinked alarms and sounds those ones too. The Ei140 series succeeds the discontinued Ei130 series smoke alarms.