It features a built-in laser, strobe light, audible message, and electroluminescent lamp working together to lead building occupants towards emergency exits.
它的内置激光，频闪灯光，声响信息，和电致发光灯共同工作将建筑物居住者引向紧急出口。
It features a built-in laser, strobe light, audible message, and electroluminescent lamp working together to lead building occupants towards emergency exits.
它的内置激光，频闪灯光，声响信息，和电致发光灯共同工作将建筑物居住者引向紧急出口。
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