Great little mouse. I got this mouse when I bought my Lenovo ThinkPad and I really liked it. It has a small (really small) USB dongle that plugs into your USB port (works well over 6ft from a computer with Bluetooth). When I opened the package I couldn't find the key, but it's conveniently stored in the mouse itself (I left mine in the USB port). The mouse works on every surface I've tried and feels good in my hand. There's a switch on the bottom that extends battery life when the mouse isn't in use (I've still been using the same set of batteries for almost two years). Works well and is built to last.
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