I highly recomend this mouse. I used it almost 3yrs until I knocked it off the desk & the battery spring come out inside the mouse. I'm buying another one, I knocked it in the floor several times but the time above did it in, so it's a very tough little mouse.
Bought this mouse in 2014, I knocked it off the desk in 2017 & the battery spring came out inside the mouse, couldn't fix.I was looking to buy this mouse again; It has on/off switch & only uses 1 AA battery & it comes with a supplied AA battery & nano usb receiver.
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