This product has been discontinued.
£50.87 inc VAT
£42.39 ex VAT
Optical smoke alarm with hush button, 10yr+ rechargable lithium backup cells, mounting plate and surface mount kit for use with the modifire system (Ei152 & MCP400):
Longlife Lithium Battery
To wire the units correctly you would use 2 core and earth cable to the first unit and 3 core and earth to the interconnected units. The alarms do not have to be earthed but a brass screw connector is provided so that the earth can be safety terminated.