Logitech M705 Marathon Wireless Mouse – Long 3 Year Battery Life, Ergonomic Sculpted Right-hand Shape, Hyper-fast Scrolling and USB Unifying Receiver, for Computers and Laptops, Dark Gray

It is a good mouse, but this is the newer version. This does not seem to be mentioned in the product description, but this version has removed the extra thumb button. How to tell them apart: The old version has grey line near where the thumb knuckle is supposed to rest. That shows you where the button is. If you look on the bottom, this version will say M/N: M-R0009. This mouse also has a ring around the laser stating it has a Darkfield laser. The new version does not have the grey line and the bottom of the mouse doesnt have any stickers to really identify it. All it has is a molded M705 towards the top of it. If you look in the battery compartment you will see the M/N: M-R0073. This mouse is also missing the Darkfield branding around its laser. It is quite disappointing that Logitech changed the mouse without notifying consumers. I tried to google this and found nothing. I went to Logitechs site and found the spec sheets and sure enough, it lists two model numbers which correspond to different Logitech support/features softwares. But, it still does not list the fact that this mouse does not have that third button or Darkfield laser. The sad part is that they are selling a mouse with less features at the same exact price as before.

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An older model mouse thats still great. I bought two years ago to use at work. Its worked perfectly all this time and Ive only had to change the battery once. The mouses size and ergonomics are great - I can mouse for hours without fatigue. There are zillions of different models of mice, and lots of tradeoffs you have to consider. Comparing this older Marathon M705 with the newer MX Anywhere 2 illustrates some of these tradeoffs. The MX Anywhere 2 can track on almost any surface. It has a permanent internal battery that recharges via standard micro USB cable, which is more convenient in my opinion than recharging the AA batteries in the M705. And it can connect to your laptop via bluetooth, if you want to free up a USB port, or via Logitech unifying receiver (the same one that comes with the M705). But the MXA2 is more expensive than the M705, and for me, the big thing is comfort. My hands are slightly bigger than average and my fingers are longer than average. The MXA2 is too small for me to use comfortably for long periods of time. When holding it, my fingers stick way out beyond the end of the mouse. Its not horrible, just a bit awkward - especially after a while. In contrast, the Marathon M705 is a little bigger (but still easy to travel with) and has, for me, perfect ergonomics. Its super comfortable to use. I ended up returning the MXA2 and purchasing a second M705 to use at home and when traveling. For some folks, the MXA2 will be more comfortable, or at least wont be as uncomfortable as it is for me. And the MXA2s ability to track on nearly any surface will be more valuable to some people than to me. For me, the M705s strengths, not to mention its lower cost, make it the best choice for me. The unfortunate thing about buying online is you cant hold the mouse first to get a sense of its ergonomics and comfort. So I strongly recommend going to a local store and holding difference mice to see which one is more comfortable before purchasing online.

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