SANWA Bluetooth 5.1 + 2.4 G Wireless Ergonomic Trackball Mouse, Finger Control Roller Ball Mouse, 3 Device Switch, Silent Programmable Buttons, 1000/1600/2400 DPl, Compatible with PC, Windows, MacOS

I have several older trackballs that I like but I preferred this style the best. Both of the companies known for making trackballs have discontinued anything close.This is very close to the MS Explorer Trackball. The hand feel and size is close. It has the same button layout too. Any Explorer user could switch without difficulty.The differences are:1) the body material, which has a slight texture and softness to it rather than painted smooth plastic. I like it better to be honest.2) The button match the body, whereas on the MS it was a contrast. I don't mind this as my hand knows where the buttons are.3) The buttons have a smooth quiet positive click. They are similar in force but without the clicking sound, this is a huge plus.4) The scroll wheel is finer. It still has clicks but they're gentler. The wheel is smooth unlike the ribs on the MS. I find it as easy to use and it stays clean! The middle click is great, slightly tighter than the MS.5) The ball doesn't light up. I think some variants on sale do have the light if you want it, but I found it annoying on the MS.6) It's wireless, but even better, it's multi-connect. There is a little receiver to act like USB but there are also two channels of bluetooth. You can switch between 3 computers with only a button click. Very solid connection, I run mine on re-chargeable NiMH and leave it on all the time and they last very long.7) It has finer resolution. The electronics seem to be able to resolve the ball (which is flecked like most modern trackballs) at a higher resolution so you don't get the little jumps on high resolution displays.The only drawback is that the buttons on the bottom are laid out strangely. The one to switch connections isn't the one next to the connection LEDs (which are very helpful). I'm not sure why the sticker next to the buttons doesn't label what they do. One is the pairing, the other switches the tracking resolution (which I leave on hi to slow the ball down) and the top on is the connection switch. I wish the connection switch was on the top but it's no trouble to turn it over and click through the settings.After I got the first one, I bought a second of the exact model.Note: the ball is not the same size as the MS, it's slightly different. It feels the same to me but you can't use this as a replacement for the ball.

I've purchased 2 of the wireless, and 1 of the wired Sanwa Gravi trackball units. I really like them, as they are a good replacement for the nearly perfect Microsoft Trackball Explorer (discontinued in the late '90's - I had like 6 or 7 of these - truely were the very best). Anyway, I have 2 complaints (one minor, one, eh... maybe not so minor). 1st, I seem to need to reconfigure the right-most button (pinky) for right-click every time I logoff or reboot. Minor issue... little annoying. The 2nd, and more annoying and potentially problematic issue is that the rubber pad on the wheel - the part that makes contact with the wheel and your thmb - I feel that this is too loose on the wheel, so I have to press down harder than I want to, otherwise, the rubber pad just slides over the wheel - and the wheel does not move. I'm thinking maybe a little Gorilla Glue or something between the rubber and the wheel will solve the issue.Other than these two issues, I am very happy with these trackballs, and I still would recommend them.

I've been looking for something similar to the Microsoft Trackball Explorer, of course this is heavily inspired by that but that's not a bad thing. I have medium to large size hands and this works great for me. I've tried the Elecom huge and Deft Pro and find this more comfortable. Ball tracks/rolls smoothly so need to swap out the bearings. The scroll wheel is a little on the narrow side and it does not have a vertical switches in the scroll wheel. The plastic is not totally shiny, it's hard without any padding but the shape negates the need for padding, feels OK but not as tactile to the touch as some like the MX Ergo. The switches are "silent". I have a gameball and ploopy trackball, I'd say from a comfort level it's on par with those. So far I'm really happy with it, I have noticed the price has already gone up (for the wired version) but in terms of value I think it's worth it.

I'm still trying to find the ideal replacement for my worn out explorer trackball. The Sanwa is the closest yet. It feels similar under your hand, the ball rolls smoothly, and it retains the odd left and right button placement I've grown accustomed to over twenty years.I got the wired version because mine never moves. It's been plug-and-play, with only a cursor speed adjustment in the Windows settings.It does have a couple of minor design annoyances - in my opinion only for my 7 1/2" hands.- The thumb button should extend forward more. The ball of my thumb sits right on the gap between theshell and the button.- The back button under your pinky finger is too sensitive. Normal hand resting pressure will inadvertently trigger it.It doesn't fit your hand quite the same, but it is the best replacement yet. I may have to try one of the two competing models to see if I can get used to the different position of the right click button, but for now this is the trackball I use every day.Update: After two months, I still like the trackball but is has an annoying flaw. The pinkie finger button is way too sensitive and and easy to press by accident. I click it and the adjacent button by mistake when simply repositioning my hand. This is maddening when filling out a web form, as most pages make you start over when the form loses focus.10-month update: The sensitivity on the two right buttons is still terrible. The smooth plastic on top of the trackball has worn away, leaving a rough and uncomfortable surface.