Purchased UPS from this Ask Enterprise, Vastral business. Their response & way of approaching so good. All staff showed me the different model and explained its salient features. Out of it, I choose this one. Glad to purchase from this vendor. They provided me an expected one. They give me warranty for this UPS. I am satisfied with this. Their service was good and the working condition of the product is also very good. I am glad for this service provider.