... 250V 50HZ filament lamp:100W Three-wire system ceiling energy saving controller Sound and light controlled energy saving controller Model:HY- ... ±20s.With power saving, no contacting, no spark, longevity, Security and ReliableApply to: stair passageway, gallery, wash room, garage, storage, ... daytimeIt suitable for all type of lamp, like as: ceiling lamp, tube light..Non suitable for loud noise place on ...