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Description:Features: 1) Auto-induction: it will automatically switch on when people come and automatically shut off when people leave. The switch will automatically turn on within its range of induction when it research the signal that is generated by human activity. The switch will continue working when people stay within the range of induction. It will automatically extend time and then automatically switch off as people leaving 2) Auto-photometry: the using of luminous sensitive control make the switch at rest in the daytime or under a highlight situation 3) Auto-time extension: when the switch receive a signal of human activity, it will automatically extend a period (e.g. 30s) to the electrical equipments. In addition, the product will extend the time from the last human activity 4) Prolonging the lifespan of electrical appliances: the switch contains a control circuit that is adopted electrical contact , which could remove electric spark and prevent the problems that is caused by the unstable voltage