Logitech Signature M650 L Left Wireless Mouse - For Large Sized Left Hands, 2-Year Battery, Silent Clicks, Customizable Side Buttons, Bluetooth, for PC/Mac/Multi-Device/Chromebook - Graphite

M650 L, and it has exceeded my expectations in every way.Comfort & ErgonomicsDesigned for large hands, this mouse fits perfectly in my palm, providing a comfortable grip for extended use. The contoured shape and rubberized side grips enhance control and reduce hand fatigue.Performance & FeaturesSilent Clicks: The Silent Touch technology significantly reduces click noise, making it perfect for quiet environments.Customizable Side Buttons: The two side buttons are programmable, allowing easy customization for different tasks.Smooth Scrolling: The SmartWheel transitions seamlessly between precise and fast scrolling.Multi-Device Connectivity: Supports Bluetooth and Logi Bolt USB receiver, making it easy to switch between different devices.

This mouse (M650L) fits my hand perfectly. I love the Bluetooth connection (no dongle at all hanging off my laptop computer - but it comes with a dongle if you really want wireless USB connection). This should be the standard bearer for all mice. Note there is a smaller size and a larger size of the same model. I tried the smaller size (M650) first and it made my medium-sized hand cramp. Then I ordered this larger size of the same model (M650L, the “L” stands for Large). People with very small hands might like the smaller size of the same model. I later got another one of the large size for my college age son (with medium size hands) for a gift. He liked it so much he actually made a special phone call just to me to thank me for it(!). He also went on and on about how comfortable the M650L mouse felt in his hand. I gave the smaller M650 to my wife (very small hands) and she likes that size. Works great. Batteries have lasted over a year with every day use. I love it! Note there are about six or so different colors from which to choose. This is a right-handed mouse. There is a left-handed version available in the large size. I don’t know if there is a left handed version of the small size or not… This is the only mouse I ever want to use in the future!

Wow, this mouse is great! I just got it, so I can't speak to longevity. I got this to replace a Logi vertical mouse that was causing issues with my thumb. I thought that mouse was quiet, but it isn't compared to this one! You can barely hear the mouse clicking. You can also barely feel it clicking. The wheel is smooth and quiet as well. The back and forward buttons are louder but not obnoxious. It was a pleasant surprise that it came with a battery in it. I guess I hadn't read the description thoroughly, so I didn't realize it was included.

I bought this to replace my M510, which I've been using pretty much since they came out. Every and then buying a new one.Importantly, the M650 immediately seems to have fixed (at least so far) the issue I've recently been having where left clicking even with a recently opened M510 has been losing and (sometimes) regaining click hold without my lifting of the button at all. With the effect that items I click and drag sometimes didn't make it where I want them to go, or even worse, were dropped in the wrong place and another item (such as a folder) was grabbed and moved to a second wrong place.I really like the overall feel of the M650L. It is sized and shaped so close to the 510 that it fits my hand just as well. I've also really quickly gotten used to how much lighter it is, which is a clear advantage but definitely made it feel different at first. I also like the feel of the side and top buttons, as well as the wheel.(Edit - Updated from to 4 stars) The reason for the low initial star rating was that I truly hate the new ridged side grips. I quite literally despise them. They are much to big/high, giving horrible tactile feel. Basically making my fingertips feel like I'd been in the water all day, but worse. I never had an issue with losing grip on the m510 style grips with there scattered light indents, so I still can't understand the reason for the extreme change. I was able to sand the ridges down not quite all the way, and having used it for a while now it is quite comfortable, so the quality of the device now comes to the front.I do wish that Logitech (or Logi, whatever) would either make a second set of models with a side grip style more similar to the M510, or sell alternate/replacement side grips in that style that as an accessory option. I'd happily pay for them.This would be a 5 star review if it weren't for the grips feeling so awful to me. But the mouse itself is great.