Đầu báo khói tại chỗ Dahua HY-SA40A

Standalone Smoke Alarm

> Split-spectrum sensor technology
> Test and silence features in one single button, silenced by a working infrared remote controller
> Loud sound output over 85 dB(A) at 3 meters
> Low quiescent current consumption
> Surface-mount device (SMD) circuit board design
> Low battery warning signal
> Sealed lithium battery, easy installation