Type No: B Size: 90*90*43mm Voltage: DC9V Alarm: sound-light Sensor: infrared photoelectric sensor Applicable area: 30m² Sensor time: 2 seconds Installing location: ceiling Battery life: 2 years Battery: No.5   Anlian Co.,Ltd  is Designer / Manufacturer / Factory / Wholesaler of  smoke monitor detector. As an OEM manufacturer, we support our distrbutors to add custom...