DAHUA - HY-SA21A-W2(868) - Wireless Smoke Detector

Dahua Wireless Smoke Alarm(868MHz) provides battery-powered smoke detection and alarm functions within a single unit.
Advanced electronics in conjunction with a photoelectric smoke sensing chamber provide early detection of smoke and high immunity against unwanted alarms.
This kind of smoke alarm does not require a mains supply and is suitable for general residential applications.
Timely notification of the smoke alarm can be displayed on DMSS App in real time.