Nulea M514 Wireless Trackball Mouse – Reduce Wrist Strain with Ergonomic Vertical Design – Precision Thumb Control, Quiet Clicks, 3-Device Bluetooth & USB, Rechargeable for PC/Mac

Customers find the trackball mouse well-built and comfortable, with smooth trackball movement and ergonomic design that relieves shoulder and wrist tension. The scrolling features receive positive feedback, with one customer noting the ability to scroll both vertically and horizontally. While some customers say it fits their hand perfectly, others find it slightly too small, and opinions about button responsiveness and compatibility are mixed.