Specifications:Rated voltage: 90V - 250VRated frequency: 50Hz - 60HzDimensions: 7 x 12 x 3.5cm / 2.8 x 4.9 x 1.5�� (W x H x D)Color: Silver grey and blackSaves between 10 and 30% of energy per appliance， depending on the typeInstructions includedNew -type Intelligent， Digital And Powerful Electricity Saving Devicesave energy sources efficientlySmart， sleek design with LED lights to indicate operationprolong the life of electrical devicesenviroment-friendlystabilize the voltagebalance the current sourceprotect deviceseasy to use-no maintenanceSaving electricity means saving money saving money means earing moneyHow does it Work:The electricity saving device saves and reduces energy by stabilizing the voltage which in turn results in reductions in peak power demand and less waste of low efficient power. The low efficient power is consequently stored and recycled by the unit.Packet content:1x Electricity Saving Box (US Plug)