... : message ,sound ,alarm... 4) Certificate: CE, CCC Multi-signal lamp, Signal tower lightFeatures:Using ultra-high brightness LED as the light ... -durable, with more than five years of life, not change the light bulbs, set alarm sound and flashing alarm as ... and attractive appearance, low price.Main technical parametersSound way: Sound signal, alarm sound, musicRated voltage: DC12V, 24V, AC110V, 220V. ...