... Detailed Product Description No.:JB-S04Sensitivity standard: EN14604 Innovative Smoke Alarm, Meets CE, RoHS and Standards 3 years quality ... identification circuit and alarm circuit Infrared scatters on the surface of the smoke when the smoke enters the darkroom of ... include mechanical doorbells, bells, AC and DC PIR motion sensors, night lamps, smoke alarms, water alarms, pool alarms, personal ...