433MHZ Smoke Detector Wireless Smoke Fire Alarm Sensor Security Protection Alarm for Home Work with Sonoff RF Bridge

– Built-in high-sensitivity sensing technology, reliable and safe. – 360 degrees smoke detection and alarm, no dead angle, reliable. – Rotary detachable top cover design to facilitate cleaning and battery replacement. – Full snap-in patented structure, simple installation, no need for debugging and wiring. – Built-in 90 dB sound and light alarm reminder, effectively prompting people to evacuate. – Support three alarms: independent sound & light flash alarm, wireless 433 transmission network alarm. – Ultra-low-power microcontroller + photoelectric principle technology Note 1: Needs to be used with SONOFF RF BRIDGE.