I am Mac user and have am particularly looking forward to a USB port to block more with a transmitter. None. Bluetooth is not working. It's annoying that the manufacturer advertises fat (and this also still) even though the manufacturer is now known that Bluetooth does not work with Mac. The mouse is otherwise very well made; light, very accurate in operation. The software is easy to use and the desired functions can be easily konfigurieren.Die surface of the mouse is even after a year on the road with no scratches. 4 stars for this mouse. 1stern deduction for false information regarding Bluetooth with MAC computers.