, Model: CSL TM137U wired optical USB mouse vertical model particularly arm-friendly , Connectivity: USB 2.0, optical sensor, high sensitivity in comparison with other conventional optical mice. Sampling rates 1000 - 1600dpi (freely selectable with dpi selection switch) / precise operation on nearly every surface , 5 buttons & scroll wheel, left & right mouse buttons, Forwards & backwards button optimally provides remarkable comfort while surfing the internet. Easy to operate buttons and scroll wheel , Prevent possible mouse arm or tennis elbow (RSI syndrome). The right choice for internet surfers as well as for people who work long periods on the computer every day. , Improved handling compared with conventional mice. Colour: black. For computer / notebook / laptop / notebook on Microsoft Windows XP / Vista / 7 / 8 / 8.1 / 10 / 11 (32- und 64-Bit), MacOS and Linux.