Type No: D Size: 102*102*46.1mm Voltage: DC9V Alarm: sound-light Applicable area: 60m² Sensor time: 3 seconds Battery life: 3 years No of Battery: 9V Battery weight: 135g Material: PC+ABS   Anlian Co.,Ltd  is Designer / Manufacturer / Factory / Wholesaler of Smoke Detector Ceiling‑Top. As an OEM manufacturer, we support our distrbutors to add custom style into the design, such...