Old style charging cable interface type

Circular plug, old-style wide flat interface.

1, round plug: belongs to the relatively early cell phone charging interface, its biggest advantage is that there is no direction, do not have to worry about inserting the wrong, can be inserted and removed at will, but the function of a single, can only charge can not transfer data, and the interface is easy to loose.

2, the old wide flat interface: the use of the old wide flat interface of the main two kinds of cell phones, one is the Samsung Anycall series, the other is Apple, the early iPhone to the iPhone4s series of devices are using the 30pin Dock interface, is also a wide flat interface, the interface transfer speed is relatively slow, the size of the large inconvenient to carry, compatibility is not good.