1. Sensing Technology Sensor Type: Photoelectric sensor. Feature: Highly effective at detecting slow-burning fires with heavy smoke (such as burning furniture and electrical wiring) before flames develop.
2. Power & Battery Battery Type: Operates using a replaceable 9V battery or a built-in lithium battery lasting up to two years. Low Battery Alert: Emits intermittent chirping sounds when battery power is low to remind the user to replace it.
3. Audible & Visual Alarm Sound Level: Minimum 85 dB at a distance of 3 meters (loud enough to wake a sleeping person). Visual Indicator: Red LED light flashes periodically to indicate normal operation and flashes rapidly when smoke is detected.
