The watertight connector enables the signal or power supply from seawater or freshwater environment to enter into the waterless environment through the waterproof and pressure-resistant shell, which simplifies the structure of the "connector" and effectively reduces the cost. The maximum working depth is up to 7000 meters.

The series has four different sizes of shells, allowing various combinations of electrical signals, high current, optical fibers, gas/fluid etc. into a wall plug, which can be used with polyurethane or neoprene cored cables.