Manufacture System Sensor Smoke Detector(DC9V) Compound optical and electrochemistry carbon monoxide sensor High-tech ,profes Name: System Sensor Smoke Detector (DC9V)SpecificationModelLS-868-9Operating VoltageDC9V (6F22 battery ... %~5%/FT OBSStandardCE&EN14604&RoHSBusiness TypeManufacture Product/Service (We Sell)Detector series,horn series,flash lamp,burglarsystem,security accessory series,CCTV ...