Main Features:- Power supply non-polarity input photoelectric smoke detector.- Dustproof & insect prevention smoke detector.- Intelligent logic control can filter most kinds of false alarm.- Anti-RFI (12V/m ~ 1GHz) & anti-EMI.- Alarm indicator for red LED.- Adopting SMT design、 separate mounting plate.- High stability of the sensor、 highly stable operation.- Using 9V battery to DC 12V power supply to detect smoke.Function: Detect the concentration of smoke in order to prevent fires at home or other placesWorking Voltage: DC 9VStandby Current:Alarm Current: =<20mAWarm-up Time: About 120sAlarm Concentration: 0.06% LELAlarm Indication: Red LED flashesAlarm Sound Pressure: >=80dBWorking Temperature: -10 ~ +50 degreeEnvironment Humidity: ＋95・RH(40≧＼2≧)Detection Area: 20 square metersColor: WhiteDimension (Dia. x H): 104 x 51mmProduct Weight: 134gPackage Dimensions(L x W x H): 150 x 118 x 52mPackage included:1 X Wireless Smoke Detector (Battery do not included)2 X Screw