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.