This article will talk about some technical specifcations first then will talk about the trend in the end. Do you know the USB Type-C (or USB-C) connector was inspired by Apple’s Lightning? Check below picture from Apple’s old patent filings, this is an Apple Lightning connector, 2 Piano keys boards in the red circles (8 pins for each side) are the signal receivers inside your iPhone jack, but both of them have the same functions of signal transmission, which means when you plug in either side of Lightning cable, only one side is working*. The cost is lower than Type C and the durability is better. However, it provided a brand new experience of dual orientation charging cable in the time iPhone 5 launched, but it also restrained the bandwidth of transmission, because only 8 pins were working.