ELECOM Ergonomic Comfort Design Trackball IST Bluetooth 5.3, Smooth Tracking with Ruby Ball Bearing, 36mm Ball, Thumb Control, Compatible for Windows, PC, Mac, iPadOS, and Android White (M-IT10BRWH)

About this item RUBY BALL BEARING MOUNTED TYPE- Ruby ball bearing provides the feelings and smoothness. INTERCHANGEABLE BEARINGS – Replaced with ELECOM bearing parts that sold separately. ERGONOMIC DESIGN – Supports your hand in a natural angled position 28 degree for all day comfort. 36mm SILVER BALL SIZE – Easy to move from one end to the other even on large screens. Dimesion – Width 3.8 inch x Length 5.0 inch x Height 2.0 inch, Weight : 5.2oz *This product does not include replacement RollMaster bearings.