... : message ,sound ,alarm... 4) Certificate: CE, CCC Multi-signal lamp, Signal tower light Features:Using ultra-high brightness LED as the ... , not change the light bulbs, set alarm sound and flashing alarm as a whole can also be independent for the ... and attractive appearance, low price. Main technical parametersSound way: Sound signal, alarm sound, musicRated voltage: DC12V, 24V, AC110V, 220V.Operating ...