smoke alarm fire special fire smoke detector 3c certification commercial household induction smoke alarm

[fire protection package] applicable warehouse, factory, apartment, etc.

(in the event) type a [smoke] battery life for one year (in the event) model a [smoke detector] + battery life for 3 years model c [no. 5 battery + high sensitivity] battery life for 2 years type c [no. 5 battery + high sensitivity] 4-year battery life d model [imported chip + alkaline battery] lasts for five years d model [imported chip + alkaline battery] lasts for ten years f model [imported chip +9v battery] standby for ten years type e [smoke + temperature] double probe detection nb [phone call sms notification] free for three years 4g [national stability online] free for three years type b [repair test parts] no accessories