SITERWELL GS525A Smoke Detector with 10-Year Battery, Photoelectric Sensor,
SITERWELL GS525A Smoke Detector with 10-Year Battery, Photoelectric Sensor, UL217-9th Certified, Low Battery and Fault Warning. SITERWELL ELECTRONICS CO. LIMITED, GS525A. 25+ Years experience. We proudly stand behind the quality of our products.