ProtoArc Ergonomic Vertical Mouse, EM11 NL Rechargeable Wireless Mouse Bluetooth, Ergo Mice with 3 Multi-Device for PC/Notebook/Laptop, 2.4GHz Optical Mice for Windows, Mac OS, Gray

I have Med-Large hands which I think is important to remember when you read this review. Hand size is very important when you're considering vertical mice. For me, I switched to vertical mice due to carpal tunnel a couple years ago, and it really helped to eliminate it. I went to Best Buy and tried both the Logitech Lift and MX Vertical. The Lift is for smaller hands and I didn't like the feel of it. So I bought the larger MX Vertical despite the $100 pricetag with the hope that it'd help my carpal tunnel. It did, but unfortunately, now its suffering from the double click issue that apparently is a feature of Logitech mice. So I began the hunt for another vertical mouse that didn't cost +$100. I knew I wanted one that was for Medium to Large hands, so I tried 3 different ones that said they were for larger hands or had similar measurements to the MX Vertical. None of them I ended up keeping for various reasons. So I bought another one hoping for better luck.Pros: This mouse feels great in the hand with a nicely textured surface. It also has some of the most satisfying buttons of any mouse I've tried with a very tactile yet soft, quiet click. The scroll wheel is nice much like the MX Vertical. The shape was exactly as described and felt like a hand shake. Despite the smaller size, I really enjoyed holding this mouse and my wrist did not drag on the mouse pad. Finally it has a rechargeable battery (which can be a con for some) and was under $20. It also comes in different colors.Cons: The con is that my hands are too big. They recommend this mouse for S-M hands vs the M-L of the others I tried, and I definitely agree. My little finger drags horribly if i put my hand in the "correct" placement. I got around this by putting my 1st finger on the left side of the first button and my 2nd finger on the right, and then use my 3rd finger as the right click, which gave my pinky room on the mouse. It worked okay but wasn't ideal. I really wish ProtoArc made a super sized version of this mouse. (Side note: I saw a knock off version of this mouse with the exact same measurements that said it was for M-L hands. Thank you ProtoArc for an accurate description)Ultimately I ended up returning it due to my hand size, but I really wish either my hands were smaller or the mouse was larger so that I could have kept it. Please ProtoArc, make a larger version for those of us with larger hands. If you did that, I'd buy it immediately.

As someone who spends long hours both thinking strategically (chess 🎯) and working intensively (college, resumes, online work 💻), I’ve put this mouse to the test in real-world, daily multitasking. Here’s what stood out:⸻✅ Pros• 🖐 True Ergonomic ReliefThe vertical grip instantly took pressure off my wrist both in fact. As Someone with a cyst in my wrist this was a huge relief!!!! Very crucial mouse for someone who types for hours and occasionally has to pause between chess games or college papers due to hand fatigue. It feels more natural, like a handshake rather than a claw.• 🔄 Seamless Multi-Device PairingI use multiple devices (laptop, Chromebook, and sometimes a tablet), and switching between them is effortless with the 3-device connectivity. No annoying unpairing/re-pairing. This is a multitasker’s dream.• 🔋 Rechargeable + Long Battery LifeAfter charging once, I’ve gone days without needing a top-up. No fumbling with AA batteries during a deadline or a chess blitz game.• ⚙️ Quiet Clicks, Precise TrackingIt’s stealthy—perfect for libraries or quiet environments. Cursor control is responsive enough for both fine document editing and rapid screen shifts during Zoom calls or multi-tab research.• 🌐 Cross-Platform CompatibilityWorks well on both Windows and Mac. I’ve tested this on different systems in college labs, and it holds up with no lag or driver issues.❌ Cons• 📏 Slight Learning CurveIf you’ve never used a vertical mouse before, your hand will feel confused for a day or two. But once it “clicks,” you won’t want to go back.Overall a very great mouse that is built to last and is very comfortable once you get used to the design!

It takes getting used too, but it comes with no drivers, as most mice don't really need them. I've had no problems with any mouse jitter or craziness when making precise mouse movements. Just takes getting used to as long as you aren't HAMMERING the mouse buttons making the entire mouse move. Take a few minutes adjusting mouse sensitivity in your OS, as well as it's built-in DPI settings, and make sure there's no interference with the 2.5ghz dongle, or if you have to many devices connected via Bluetooth (like audio.)I do wish the forward/back buttons near the thumb were a little bit lower, closer to my thumb. If you do have large hands (mine is 7.5") the mouse is still perfectly useable since I tend to use a claw-grip.Pros:No fussing with bloated apps or drivers, as it comes with no software.The USB-C port is conveniently placed so you can still use the mouse while it charges.It does have an on/off switch on the bottom.No RGB stuff (good for battery life)Supports two separate Bluetooth devices, plus it's own wireless dongle for a 3rd device.Cons:Does not use a laser sensorIt does not have a battery charge indication letting you know if it's fully charged or not, or even if it's getting a charge.The USB-C port on the mouse is only for power and battery recharging. So plugging in the USB to your PC does not connect the mouse to your computer. If you use your own USB cables that support data, the data won't be used.The provided USB cable is POWER ONLY, it has no data connections. Do not use it for other devices if you need a data connection.Very low DPI compared to most "gaming" mice but it does the job fine for gaming.