... ,long-distance signal comunication,sound and light alarm,infrared remote adjusting ApplicationThis product forms a new generation intelligent carbon ... connection points, on spot display, sound & light alarming,infrared remote adjusting, and is easy to install and operate etc.Main ... LevelMore than 85dBExplosion ProtectionExibd IDimensions270×120×50mmWeight1kgFittingsFYF5 coal mine remote control