Cheaper options are available. But few have the versatility of this particular mouse engine. 1) works with wired mouse. 2) There is an on/off switch. 3) with a 90% chance that it will work for your particular mouse. There are others that may or may not match your mouse. They may or may not fit a wired mouse. Very few will fit your awkwardly shaped mouse and have an on/off button. I know I paid a little more for it, but I don't regret it.
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