Alarm Smoke sensor with CE smoke detector, fire detector, fire alarm, 9V spare replaceable battery,High Density SMT Design

Alarm smoke sensor with CE certification ,Test function & Low voltage alarm function

Features: 1) Power source: DC 9V, AC 220V, DC 9V and AC 220V 2) Working current: : Surveillant current<15?, alarm current: <30mA 3) Alarm sound: >85dB 4) Ambient temperature: -10 ~ 50 centigrade 5) Low battery alert: 7 days 6) Can be used separately as well as in combination of up to 40 items