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      Model No : DSW98A-D    
DSW98A-D are photoelectric smoke alarms, they are generally more effective at detecting smoldering fires which smolder for hours before bursting into flame. Sources of these fires may include cigarettes burning in couches or bedding. DSW98A-D accords with the ISO/DIS 12239 Standard.

Related Power: DC 9V
Static Current: <6.5uA
Alarm Current: <10mA(18mA when with emission)
Alarm sonority: > 85 db (3m)
Low Voltage Alarm: 5.5V~6.2V
Working temperature: -10 C~50 C
Working frequency: 315MHz 433MHz
Emission distance: >50m(wide place)

1. At first, you need install them in your bedroom and routeway, and should install one item in every bedroom at least.
2. Stairway is important for you to rush out when fires occur, so there must install smoke detectors.
3. You at least require one smoke alarm on every floor,including finished attics and basements.
4. Install one alarm beside every electric facility.
5. Install smoke alarms in the middle of ceiling,because smog,heat and flashes always lift to the top of rooms
6. If some reasons cause you can’t install them in the middle of ceiling,you need to install them at least 10cm away from the wall.
7. If you like to install them on the wall, they should be installed 10-30.5cm away under the ceiling. Diagram 1.
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