(1) the shell represents different rated voltage and frequency in different colors of the electrical surface socket.
(2) The position, series and diameter of grounding contacts are different for different specifications of products. Only the same specifications can be connected to prevent misinsertion.
(3) High-quality engineering plastics for the outer shell, with high strength, impact resistance and no fear of trampling, can be used both indoors and outdoors. Suitable for alpine and tropical regions.
(4) the protection level is high, and it can be used for dustproof, waterproof, anticorrosive and other occasions.
(5) products conform to IEC309 standard and international standard.