煙霧報警器 [烟雾报－－]

Jyutping jin1 mou6 bou3 ging2 hei3
Pinyin yān wù bào jǐng qì

Definitions (Wiktionary)
  1. noun
    smoke alarm; smoke detector
    (syn.) 烟雾探测器, 煙霧探測器