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

Description 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