I was using just about several weeks, and the battery's that came with the mouse just failed! it comes with "dongle" or maybe it's called something else----usb 2.4ghz optical mouse.....very tiny drive fits in usb port.....almost like a tiny baby flash drive!! Hoping that the battery's were old.....and that why died. now need to order new ones!! back to other mouse, eek! If want small mouse....gentle sloping one and fit's medium to smaller hands, this is nice and worked fine when in use. Nice looking also.dark red.....shiny/glossy and has gloss sidesblack, with rest of mouse a flat black on parts thumb and finger rests and bottom. Doesn't tire hand as much as larger mice do.
Love the mouse and keyboard. Basic unbox, plug, and play. Replaced my previous Logitech on which I had worn the mouse feet off. The keyboard is streamlined and typing on the keys is not overly loud. The mouse fits well in my hand, and both work are working at a distance of several feet from my USB port. Very happy with this purchase.
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