The alarm is working when it's on. The led twinkles once every minute. The alarm makes clear and pulse signal with sound and light while there is smoke. And output several point signal or wireless signal for gathering till the smoke is gone.

While press the test button and hold on for over 3 seconds, the alarm will make a clear and loud pulse signal. And the led twinkles frequently, the alarm give off sound like "Di…Di…"
 

Install and Use:

Choose a suitable place first. And then fix the foundation with screws. Turn the sensor on the foundation according to the color of lines. One sensor in 25~40m*m space,0.5~2.5m above important equipment.

LAN wire mode:

Red line --12V                          White line--OFF

Black line--Ground                   Green line--On

Blue line--Public