EPA 2012, Four-Faith exhibited wireless data terminal products with the State Grid Center certified. Indicator of the product's insulation, high and low temperature, radio-frequency radiation, electromagnetic fields, high-frequency interference, surges and interference, the integration of smart grid projects mean a lot to the implementation of the project. Four-Faith DTU \ router meet or exceed the relevant national standards, passed related certification of State Grid Metering Center. And the partners recognized Four-Faith wisdom and reliable products.