A high-quality optical smoke detector offering outstanding detection performance at a very competitive price. Manufactured by C-TEC in the UK. Third-party certified to EN54-7 by Intertek. Wide 6-33V DC operating voltage. Two 8mm x 2mm ultra-bright red LED indicating strips offering 360º visibility. Drift compensation functionality ensures detector sensitivity is automatically calibrated to suit prevailing conditions and/or increased contamination levels allowing a greater than 8 year life-span. Compatible with our ActiV C4408D diode, C4408 non-diode and C4408R relay bases.