TengFei International Co. Ltd. ,Shenzhen Shengjiaying Technology Co. Ltd, established in 2000 is a professional power bank manufactory which specialized in researching, developing producing and marketing of power banks, phone charger portable power bank, unique design power bank and universal power bank as a gold supplier more than 5 years in Alibabawe always provide the BEST quality and service ,competitive price and trusted customer experience .brbrTengFei International Co.> Ltd. Shenzhen Shengjiaying Technology Co.( Ltd has gained the certifications of the ISO9001-2000 Quality Management System and CE) ROHS FCC, etc.All products are strictly tested whole business process. We have built an excellent sales group all your inquiries will be responced quickly and efficiently, followed up promptly and keep you informed of every updates from order confirmation till goods reached in fine condition. Also the professional and experienced after-sales service department will contact with you in time. Your valued comments and feedback can help us to improve the products and service step by step.