One of the most advantage is the prices are much lower than other brands at the same quality.\n\nour omr are made based on international standard. all of them have gained iso 9001, fcc and ce certificates and we are the manufacturer and exporter, so it's no problem to supply you the best products with competitive prices.\n\nif you are interested in the item, please feel free to inform me. i will try my best to serve for you.\n\n