ELECOM Wired optical trackball mouse (thumb operation type) M-XT2URBK Black
09 May 2018
Great trackball
After 2 weeks, every day working.
Good trackball ( I have the wired one ), shorter than M570 so may cause some pain on hand. If it would had the M570 size would be great.
Also the scroll wheel is a bit too high, had to bend the finger too much.
Very smooth tracking, also can be used M570 ball ( like all said ) and feel good clicks. Programmable buttons are great +.
DPI much better than M570.