rf smoke detectors optical smoke alarm for gsm alarm system

1. wireless smoke detector for home alarm system

   2. 433MHz or 315MHZ optional

   3. Apply optical smoke test room

   4. Insect-resistant design

   5. LED light display

   6. Using ABS material

   7.Standalone surface mounted, easy operate

   8.With buzzer

   9.power: 9v battery

  10.Suitable for homes, shops, schools, office buildings, etc.

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