smoke alarm,smoke detector network 2-wire Remote LED indicator Dustproof,mothproof and anti-light interference 2-wire photoelectric smoke alarm,smoke detector(network)Power supply non-polar input:DC 9V~35V Stainless steel shield,Anti-RFI;SMT adopted,high stability. Dustproof,mothproof and anti-light interference design. MCU processing adopted,eliminate false alarm. Remote LED indicator. Power-off ...