USB extension cable compatible with USB 2.0 and 1.1 that feeds the signal on those occasions it is necessary either that the peripheral requires a good signal to work correctly, or because they exceed the maximum allowed distance USB. In addition to a simple cable, you have the electronics necessary to perform this function. This is a 15 m cable, connector type A-Male at one end and B-Male in the other. Allows you to chain 3 units for a total of 45 m of cable (3 pcs x 15 m = 45 m). It should be borne in mind that each extender uses 0.14 A computer's USB port, which have been adding the amperage of each of the extenders used, plus the USB peripheral's own consumption (the theoretical limit of a USB port is 0.5 A). Compatible with Windows and Mac OS.