It is a passive hub, ie without power supply.
When plugging in the hub in a USB port, an orange LED at the top lights.
There are three terminals, behind even a fourth, in less space can not accommodate four USB ports, a very good solution on the front.
The most important thing: It works, at least for me!
Who does not have enough front USB ports on the PC to which this hub is likely to be the problem solver, who needs more rear ports on a PC, will possibly rather a larger, more stable hub, possibly with power supply, get, especially the fixed to the hub cable is not very long (with plug 25cm).