Shenzhen Ounuo Technology Co., Ltd was founded in 2004 ,we have 1000 square meters plant. We are specialized in Power Bank and Bluetooth Speaker manufacturing. Currently we have over 230 models power bank for your selection. Your customized samples can be ready in just half a month. Leave your concerns on quality to us, we provide a one year warranty on the products.All of our products passed CE,FCC and Rohs certificates which are widely used by client from all over the world.