Note: Designed for data transfer, not enough power for 3 devices at the same time. Can't charge IOS devices If you plug it into the charger instead High Speed Version: 1 upgraded USB 3.0 ports, speed up to 5 Gbp/s. 2 downstream USB 2.0 Ports speed up to 480 MB/s, suitable for PC computer, laptop, MAC, U disk, card reader, USB mouse, USB keyboard, scanner, digital cameras, USB sound cards, hard disk boxes and other devices.