eWeLink Smoke Detector Sensor

Features:
*Support three alarms: independent sound light flash alarm, wireless 433 transmission network alarm.
*360 degrees smoke detection and alarm, no dead angle, reliable. Built-in 90 dB sound and light alarm reminder, effectively prompting people to evacuate.
*Adopt high-performance photoelectric two-way scattering patented technology of two-receiving one-transmitting and high-sensitivity sensing, stable, reliable, safe and accurate.
*This smoke sensor can work alone to realize independent alarm at home. To achieve remote control on the phone, smoke detector needs to work with Sonoff RF bridge( 433Mhz, EV1527) host.
*Ultra-low-power microcontroller + photoelectric principle technology, long standby life battery use for 3 years.
*Low Voltage Alarm: When the battery voltage is lower than 6.8V, a warning sound is issued to remind the user to change the battery.
*Full snap-in patented structure, simple installation, no need for debugging and wiring. Convenient for cleaning and battery replacement.