Do you want your cup to runneth over with USB ports? Do you want it to also be filled with the sweet, sweet nectar of an on-off switch? If the answer to either of those questions is yes - or "I never really thought about it that way but I guess so" - then this is the perfect product for you!
This mini USB hub has four USB 2.0 ports each with a max total transmission speed up to 480 MBps. All four ports are powered thru the USB micro-B cable. There's also a single on-off switch that controls the four USB ports. There is a port for an external power supply but its connected directly to the 5V line so if you need to externally power, we recommend prying open the case and cutting the red 5V line from the USB connection.
These are great for expanding your BeagleBone Black, Pi A+ or other single-board-computer's USB capability to add a bunch of ports. It's also great for giving your laptop or computer a few more plug-in options.