1. Pls link the colorful dock with the cable, and then charge galaxy phone by the Charger Dock
2. You can read and writhe the data in the mobile on your PC.
The four slots support:
TF（MicroSD）/Micro SDHC
SD/Mini-SD/SD Ultra/MMC/MMCII/RS-MMC/HS-MMC/SDHC
Ms/Ms Pro/Ms MG Pro/Ms Duo/Ms MG Duo/Ms Pro Duo/Ms MG Pro Duo
Micro MS（M2）

3. Two usb ports, it can support 500G hard disk and printer.

4.As a dock for mobiles.
Micro USB port support: Samsung 9100/9220/9300/9500/N7100 and the mobile with micro usb port(OTG)