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ZT-ST5-5 Zeta 3V Standalone Smoke Detector (5 Year Life)
They feature VdS and UL-approved photoelectric sensing components with precise smoke detection and long life operation (5 year life with a 3V lithium battery) or (10 years with a 3V long life lithium battery). A proved quality with 10 million pieces installed over the world. Russian standard model available too.