Product type C: The length of the mother seat is 11.5mm, the width is 10.6mm, and the interface is elliptical. The size of the interface is approximately 8.3mm × 2.5mm, supports forward and backward blind insertion, with waterproof function and waterproof rubber ring. The tail of the type C base is welded with one red line and another black line, and this product can be used without the need for PCB board welding for simple charging function. There are two styles of this product, one without terminal blocks and the other with terminal blocks. When using without a wiring terminal, it needs to be connected to the red and black wires in order to use it. The wiring terminal can be used through the terminal. Due to the fact that the product only has two lines, it only has charging function.