(1)special rocker design with high quality spring make clipao switch life to 8000 times.4mm electicity distance can reduce the electric arc efficiently. (2)spacial protection design can guarantee your life safely .Clipao socket life can reach 25000 times. (3)the panel material is polycarbonate from GEcompany with the quality of fire resistance anti-UV light,no coloer change .the base material is PP66 from japan to insure the stable structure and long life . (4)switch with pure silver contact has high efficient reducement for arc electric.