Qingdao Hansizhe Ocean Technology Co., Ltd. was established in 2022, mainly engaged in communication engineering between surface ships and underwater detection systems, such as sonar, hydrophone and underwater robot. Watertight connector has always been the key component of internal and external signal connection of ships. This series of products belong to deep water connector series, which can be widely used in ship engineering, underwater instruments, underwater mining equipment and deep well probes, underwater remote control robots and submarines, light and heavy torpedoes and torpedo tubes, ship-towed sonar and underwater acoustic devices. The application scope covers underwater ship signal transmission, marine exploration, diving operation and the connection between watertight junction boxes and cables in underwater acoustic devices. This series of connector products have excellent environmental resistance, sealing performance, mechanical reliability and other characteristics, and are convenient to install and maintain. It can be used for long-term immersion in deep water, and the water release depth can reach 8000 meters underwater.