Divevolk Intelligence Tech Co., Ltd Divevolk team is a group of people who never compromise and stick to their dreams. We are committed to the research and development of intelligent equipment for underwater communication, interconnection, and interaction, providing brand new experiences for global diving and water sports enthusiasts, and continuously improving underwater safety. With our own R & D center, a number of domestic and international patents have been obtained. The brand "DIVEVOLK®" is currently registered in the United States, Australia, Malaysia, Japan, the Philippines, the European Union (28 countries), and China. https://www.4shared.com/u/aWt3JrLc/divevolkdiving.html