3 in 1 USB cable is with Micro USB connector, 8 pin connector, Type C (USB 3.1) connector.
Change the 30 pins (iPhone 4 connector) to the type c connector.
This model could be used as a charging cable and data transfer cable (8 pin connector).
5V 2.4A output instead of 5V 1A output could be used to charge three devices with fast speed at the same time.
Cable length : 120cm