... battery-operated 2.Low battery alarm 3.LED indicator 4.CE,RoHS,EN14604 PENDING photoelectric smoke alarm BH-F507S is under ... , VDS, NF Standards. This smoke detector features UL-approved Photoelectric sensing components with precise smoke detection. and long ... of this smoke detector, welcome to establish business relationship with our company. 9V battery operated smoke alarm BH-F507S CE ROHS