The inverter can convert direct current to alternating current with 220V,50Hz for the electric appliance.With beautiful outlook and easy operation, The inverter is able to stabilize voltage-output automatically. Particularly, they have many protective functions against short voltage of direct current, overload of output, and so on. The core components of ¡°SenWei¡± inverter adopts the high quality equipment manufactured by the American FAIRCHILD company and circular transformer with power-save model. Therefore, the wastage of the equipments is very low. Proved by a lot of tests, the equipments run safely and steadily with high productivity and a long life.