Product Features: Battery: DC9V or AC110V,220V Alarm Sound: ≥85db(3m) Static Current: ＜8 礎 Alarm Current: 10mA Low Voltage Alarm: 5.5V~6.2V Work Temperature: -5~+40℃ Working Humidity: ＜93%RH Low Battery Alert Remain: 7~15 days ST-98 Smoke Alarm User抯 Manual ST98 series 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. ST98 accords with the ISO/DIS 12239 Standard. IMPORTANT! PLEASE READ CAREFULLY AND KEEP IT. This user抯 manual contains important information about your smoke alarm抯 operation. To insure your safety, you need install one alarm at least in your every single room. Please don抰 open the smoke alarm for that may cause improper effect. If you are installing this smoke alarm for use by others, you must leave this manual 杘r a copy of it梬ith the end user. TECHNICAL PARAMETER DC power:power:DC9V Static Current: <10uA Alarm Current:<12mA Low Voltage Alarm: 5.5V~6.2V AC power: power: 110V220V Current:<25 mA Alarm sonority:> 85 db (3m) Working temperature:-10℃~40℃ WHERE TO INSTALL SMOKE ALARMS At first, you need install them in your bedroom and routeway, and should install one item in every bedroom at least. Stairway is important for you to rush out when fires occur, so there must install smoke detectors. You at least require one smoke alarm on every floor,including finished attics and basements. Install one alarm beside every electric facility. Install smoke alarms in the middle of ceiling,because smog,heat and flashes always lift to the top of rooms If some reasons cause you can抰 install them in the middle of ceiling,you need to install them at least 10cm away from the wall. If you like to install them on the wall, they should be installed 10-30.5cm away under the ceiling. Diagram 1. You need install more than one alarm when the length of your hall exceeds 9m. In an ablique roof room,install the alarm 0.9m awa