We will be buying more receivers ASAP! M. Everything is usb now. When I first set up the mouse, DPI was set to 1100 and felt even higher than the 1300 used on my G403. Kept my heart rate high! Only advice is to be gentle while installing, dont rush and follow the guidelines in the video provided by manufacturer. and so I think it?ll frustrate the average user with its limited size. Mounted it vertically instead of horizontally. Love this ultra comfortable stylish boot! ? OPTIK: Schick.