I have two RollerMouse Red devices. One is relatively old; the other is not yet four months old and bought through Amazon US, but they only allow two months for returns. One has a scroll button that operates erratically when scrolling; the other’s left mouse button is either loose or broken.
Unfortunately, there’s no repair facility in Australia for these products. I got in touch with Contour in the States and they’re sending me the spare parts to repair the devices myself. They say it’s quite straightforward (ha-ha!).