1. All plastic parts are made of PC material; satisfy demands of intensity, insulation and toughness. 2. The big area of alloy silver terminal ends with high melting temperature and not easy to oxidize. 3. Ultra-thin base is applicable to all size of surface or flush mounting boxes. Switch and socket in unified style, avoid the trouble of searching different sizes of cover plates. 4. Integrative internal wiring is efficient in installation; prevent the risk of fire caused by external wiring. 5. Double-panel design skillfully wraps the paint in decoration and protects the mechanism. 6. Applicable to energy saving units, voice sensor delay switch, touch delay switch, push delay switch and motion control delay switch etc.