... adopted Infrared photoelectric sensor High density SMT design Name:2 Wire Photoelectric Smoke Detector(DC24V)Feature1.CPU processing adopted2.Auto output ... .Unique structure with dustproof, anti-fly, anti-light design10.Two-wire system(For fire alarm)ModelLS-828-2PL-1Operating VoltageDC24VStandby currentLess than1 ... series,horn series,flash lamp,burglarsystem,security accessory series,CCTV system