ELECOM Relacon Handheld Trackball Mouse, Thumb Control, 2.4GHz Wireless, Ergonomic Design, 10-Button Function with Smooth Tracking, Windows11, MacOS (M-RT1DRBK)

Customers find the trackball mouse easy to use and appreciate its software capabilities. The ergonomics receive mixed feedback - while some say it fits comfortably in hand, others report it doesn't suit their hands well. The responsiveness and button functionality are also mixed, with some finding the trackball very responsive and the buttons well-placed, while others find it frustrating to move with precision and report issues with button programming. The durability is concerning, with multiple customers reporting that the roller ball falls out repeatedly.