Photoelectric smoke detector 1.9V battery-operated 2.Low battery alert 3.With LED indicator 4.CE,RoHS,EN14604 PENDING photoelectric smoke alarm1.9V Battery detector2.High alarm 85dB(3m) smoke alarm3.Test button4.Low battery alarm Photoelectric smoke alarm BH-F507S is under BSI approval, and can be calibrated into either UL, VDS, NF Standards. This smoke detector features UL-approved Photoelectric ...