Nulea M509 Trackball Mouse Wired, Ergonomic Design, Easy Thumb Control, Precise & Smooth Tracking, 2-in-1 Interface (Type A &Type C), Compatible for PC, Laptop, Mac, Windows(Red).

I would purchase again if needed, and recommend.I am new to trackballs. This is my second trackball. The first one I bought was a logitech M575. I got it to go with a laptop because sometimes you find yourself in situations where a mouse is harder to use / no good surface to move it on. It takes just a little bit to get used to moving your thumb instead of a mouse. I enjoyed the experience and wanted a wired trackball for my desktop.This device in comparable in size and layout to the logitech M575. Like a larger mouse, it more comfortably fills a medium to large adult hand. The ball is the same size and weight as the M575. The narrower right click button is actually nice for me, as I can move my middle finger off of it so I don't accidentally click it. Both mouse buttons feel (not measured) about twice as stiff as the logitech, so I don't have to focus on holding my fingers completely off of the mouse buttons to avoid accidental clicking. (This can become a thing as we age and the tendons get just a little tighter, remember to stretch your finger tendons from time to time.) The top of the body of the device has a soft rubber / silicone coating. There are rubber feet to keep it from sliding around on the desk. The cord is plenty long enough for most situations, and has a soft rubber / silicone insulation. It is not quite as flexible as really soft silicone stranded wire, but it is much nicer than the bog standard vinyl / plastic wire and a very nice surprise. The usb c to a adapter seems good quality, but it has just a tiny bit more give than I would like to see. I don't think it will be a problem, but I would recommend a little care not jerking the cable around and when plugging / unplugging. i run linux, and everything is working great. lsusb shows the device as Holtek Semiconductor, Inc.

Pros: The nulea trackball mouse is plug and play replacement for my Logitech Trackball Mouse. One third the original cost of my Logitech Trackball Mouse. Zero learning curve almost as this only had a few extra buttons to learn the function of. Left click, Click, Right click and Track wheel so similar that you'd almost swear you are using the original Logitech mouse. Has Fwd and Rev buttons just to left of the left click button. I can see how this could help if you were jumping between screens. The button at the top of the mouse allows for fine tuning of the DPI movement of the mouse without having to mess with your software settings. It is like nulea took a Logitech mouse said let's copy it but make the edges more rounded and easier to manufacture. There are four antiskid pads on the bottom of this trackball mouse vice the three used on the Logitech it replaces. You can even use the ball from your old Logitech trackball with this nulea mouse.Cons: Will not be easy to dismantle for deep cleaning in the future. There appears to be only one screw holding this trackball together, although if I were to attempt to dismantle this mouse I'd first remove all four antis skid pads and probably the part of the bottom label that feels like it is covering a hidden screw too. The surface of this mouse is actually slippery and takes a little getting used to. Also before doing this review I noticed that there is no protective window between the sensor and the ball like there is on other mice I've had in the past, hopefully this will not be any problem in the future. Another case issue is it appears the same case is probably being used for both the BT mouse and corded variety as there is the outline of a battery compartment in the plastic, not a big issue, but something to make you think a little.Yes I'd buy this mouse again, actually have bought a second one, Also I'd recommend this to friends as well. Will change this review should anything change bdv

Updated review: I'm going to update this to 5-stars because the Seller reached out and made it right. I received a brand-new product, and it's working like a champ. I'm pleased that they worked so hard to make it right, and I'm grateful that the mouse is working perfectly. Here's to hoping that the other one was just a one-off, but so far this is smooth sailing.I should have read the reviews before purchasing. It worked for only about 3 weeks and then suddenly stopped working. It's a wired mouse, so has nothing to do with batteries or pairing. It worked at first. I took the ball out and cleaned it, but it still is sluggish and draggy and takes a great deal of effort to get the cursor to move. It's not ergonomically friendly to have to work that hard to get the mouse to move the cursor. Ridiculous! I should have spent more money and just gotten the expensive one at the Brick-and-Mortar Big Box Computer Retailer here in town. Do not buy!

good and works well, but the ball feels a bit loose, and the dpi takes some getting used to. its cheap though