... 3) sound type : message ,sound ,alarm... 4) Certificate: CE, CCC Multi-signal lamp, Signal tower light Features:Using ultra-high brightness ... LED as the light, multi-layer structure, the color shade can be any combination ... Voltage Range: Rated Voltage 85 ~ 110%.Operating temperature: -20 ~ +50 °C.Wiring: wire type.Shade Color: Red, yellow, green, blue, white ...