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"Corsair offers a 1 year, replacement-only warranty for certified refurbished PSUs, Cases, Cooling units, SSD, USB parts, Audio, and Gaming Peripheral units."
you don't want a laser mouse, and honestly most of corsair's mice are kind of gross; weird shapes and fairly heavy. the ones you should be looking at are the M40, M45, and Sabre Optical. those all have very good sensors, the best being the one in the M45 (PMW3310). they all should perform very well tracking-wise unless corsair has some crappy implementation or something, so just buy one of them based on their features and/or price and don't worry about the sensor. if you want a small, light mouse that doesn't lack sidebuttons check out the logitech g303. you can find refurb ones sometimes for around the same price as these corsair mice. it has a weird shape that a lot of people find uncomfortable so keep that in mind. i don't like heavier mice (90-100g or more) so i can't give you much advice on that front if that's what you want other than that the steelseries rival is very good. if you have more questions just let me know.
