... sound type : message ,sound ,alarm... 4) Certificate: CE, CCC Multi-signal lamp, Signal tower light Features:Using ultra-high brightness LED as ... attractive appearance, low price. Main technical parametersSound way: Sound signal, alarm sound, musicRated voltage: DC12V, 24V, AC110V, ... 110%.Operating temperature: -20 ~ +50 °C.Wiring: wire type.Shade Color: Red, yellow, green, blue, white.Power: ≤ 5W ...